Podcast
Questions and Answers
The change of direction of light by a mirror is called ______ of light.
The change of direction of light by a mirror is called ______ of light.
reflection
Light travels along ______ lines, as demonstrated by the inability to see a candle flame through a bent pipe.
Light travels along ______ lines, as demonstrated by the inability to see a candle flame through a bent pipe.
straight
A beam of ______ can be seen from the headlamps of cars.
A beam of ______ can be seen from the headlamps of cars.
light
Any polished or shiny surface can act as a ______.
Any polished or shiny surface can act as a ______.
The story of the lion and the rabbit from the Panchtantra illustrates the concept of ______ in water.
The story of the lion and the rabbit from the Panchtantra illustrates the concept of ______ in water.
A beam of searchlight can be seen from a ______ house.
A beam of searchlight can be seen from a ______ house.
Looking at a candle through a straight and then a bent pipe demonstrates that light travels in ______ lines.
Looking at a candle through a straight and then a bent pipe demonstrates that light travels in ______ lines.
A mirror changes the ______ of light that falls on it.
A mirror changes the ______ of light that falls on it.
The images of objects in the side mirror of a scooter or a car appear ______ than the objects themselves.
The images of objects in the side mirror of a scooter or a car appear ______ than the objects themselves.
The curved, shining surface of a spoon acts as a ______.
The curved, shining surface of a spoon acts as a ______.
If the reflecting surface of a spherical mirror is concave, it is called a ______ mirror.
If the reflecting surface of a spherical mirror is concave, it is called a ______ mirror.
When using the outer side of a spoon close to your face, the image you see is generally ______.
When using the outer side of a spoon close to your face, the image you see is generally ______.
Using the inner side of a spoon, the image you see will appear bigger but when increasing the distance of the spoon from your face, you may see your image ______.
Using the inner side of a spoon, the image you see will appear bigger but when increasing the distance of the spoon from your face, you may see your image ______.
The stainless steel plate acted as a ______ mirror, which shows that the image erect and is the same size.
The stainless steel plate acted as a ______ mirror, which shows that the image erect and is the same size.
The most common example of a curved mirror is a ______ mirror.
The most common example of a curved mirror is a ______ mirror.
When using the inner side of a spoon close to the your face, the image you see is generally ______ and larger in size.
When using the inner side of a spoon close to the your face, the image you see is generally ______ and larger in size.
Looking directly at the Sun can ______ your eyes.
Looking directly at the Sun can ______ your eyes.
A real image formed by a concave mirror can be obtained on a ______.
A real image formed by a concave mirror can be obtained on a ______.
When using a concave mirror, the image's size can be either smaller or ______ than the object, depending on the distance.
When using a concave mirror, the image's size can be either smaller or ______ than the object, depending on the distance.
[Blank] mirrors are commonly used by doctors for examining areas like the eyes, ears, nose, and throat because of their ability to magnify images.
[Blank] mirrors are commonly used by doctors for examining areas like the eyes, ears, nose, and throat because of their ability to magnify images.
Dentists often use concave mirrors to view an ______ image of teeth, which helps in identifying dental issues more effectively.
Dentists often use concave mirrors to view an ______ image of teeth, which helps in identifying dental issues more effectively.
The reflectors in torches and headlights are ______ in shape to concentrate the light into a beam.
The reflectors in torches and headlights are ______ in shape to concentrate the light into a beam.
A virtual image is formed by a concave mirror when the object is placed too ______ to the mirror.
A virtual image is formed by a concave mirror when the object is placed too ______ to the mirror.
To obtain a sharp image of a flame on a screen with a concave mirror, one must adjust the ______ until the image is clear.
To obtain a sharp image of a flame on a screen with a concave mirror, one must adjust the ______ until the image is clear.
A rainbow usually appears after the rain when the Sun is low in the ______.
A rainbow usually appears after the rain when the Sun is low in the ______.
A rainbow is seen as a large ______ in the sky with many colours.
A rainbow is seen as a large ______ in the sky with many colours.
When observed carefully, there are ______ colours in a rainbow.
When observed carefully, there are ______ colours in a rainbow.
When you blow soap bubbles, they appear ______ due to light interference.
When you blow soap bubbles, they appear ______ due to light interference.
When light is reflected from the surface of a Compact Disk (CD), one can see many ______.
When light is reflected from the surface of a Compact Disk (CD), one can see many ______.
A glass ______ can split a beam of sunlight into seven colours.
A glass ______ can split a beam of sunlight into seven colours.
The seven colours of the rainbow can be painted on segments to demonstrate the composition of ______ light.
The seven colours of the rainbow can be painted on segments to demonstrate the composition of ______ light.
You can only see a rainbow when your ______ is towards the sun.
You can only see a rainbow when your ______ is towards the sun.
An image that cannot be obtained on a screen is called a ______ image.
An image that cannot be obtained on a screen is called a ______ image.
The image formed by a ______ mirror is always virtual and smaller in size.
The image formed by a ______ mirror is always virtual and smaller in size.
An image formed by a ______ mirror is always the same size as that of the object.
An image formed by a ______ mirror is always the same size as that of the object.
A concave lens always forms an erect, ______, and smaller image than the object.
A concave lens always forms an erect, ______, and smaller image than the object.
When used to see objects magnified, the convex lens is called a ______.
When used to see objects magnified, the convex lens is called a ______.
[Blank] light is composed of seven colours.
[Blank] light is composed of seven colours.
When the object is placed very close to the ______, the image formed is virtual, erect, and magnified.
When the object is placed very close to the ______, the image formed is virtual, erect, and magnified.
When replicating the candle experiment with a glass of water, friends will be surprised to see the candle burning in ______.
When replicating the candle experiment with a glass of water, friends will be surprised to see the candle burning in ______.
Creating a rainbow involves standing with your back towards the Sun and making a fine ______ in front of you using a hosepipe.
Creating a rainbow involves standing with your back towards the Sun and making a fine ______ in front of you using a hosepipe.
Visiting a laughing gallery allows you to see distorted and funny images of yourself in large ______.
Visiting a laughing gallery allows you to see distorted and funny images of yourself in large ______.
ENT specialists and dentists use special ______ to examine hard-to-reach areas, such as the ear, nose, throat, and teeth.
ENT specialists and dentists use special ______ to examine hard-to-reach areas, such as the ear, nose, throat, and teeth.
In the role-play game, the 'image' has to mimic the movements of the '______' correctly.
In the role-play game, the 'image' has to mimic the movements of the '______' correctly.
The role play game involves one child acting as the object and another acting as the ______ of the object.
The role play game involves one child acting as the object and another acting as the ______ of the object.
In the role play game, if the image fails to make the correct movement, he/she will be ______.
In the role play game, if the image fails to make the correct movement, he/she will be ______.
According to legend, ______, a Greek scientist, used mirrors as weapons more than two thousand years ago.
According to legend, ______, a Greek scientist, used mirrors as weapons more than two thousand years ago.
Flashcards
Light travels...
Light travels...
Light travels in a straight path.
Reflection of Light
Reflection of Light
A change in the direction of light when it strikes a surface.
Mirrors
Mirrors
Polished or shiny surfaces that reflect light.
Light travels along...
Light travels along...
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Beam of sunlight
Beam of sunlight
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Light beams in daily life
Light beams in daily life
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Mirrors and reflection
Mirrors and reflection
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Panchatantra
Panchatantra
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Curved Mirrors
Curved Mirrors
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Spherical Mirror
Spherical Mirror
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Concave Mirror
Concave Mirror
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Erect Image
Erect Image
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Inner Side of Spoon
Inner Side of Spoon
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Convex Mirror
Convex Mirror
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Plane Mirror Image
Plane Mirror Image
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Inverted Image
Inverted Image
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Rainbow
Rainbow
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Rainbow colors
Rainbow colors
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Sunlight composition
Sunlight composition
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Glass prism
Glass prism
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Dispersion
Dispersion
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Rainbow viewing
Rainbow viewing
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Soap bubbles' colors
Soap bubbles' colors
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CD colors
CD colors
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Real Image
Real Image
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Virtual Image
Virtual Image
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Concave Mirror Image Size
Concave Mirror Image Size
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Concave Mirror Image Type
Concave Mirror Image Type
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Medical Uses of Concave Mirrors
Medical Uses of Concave Mirrors
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Concave Mirrors in Lighting
Concave Mirrors in Lighting
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Why are Concave Mirrors Useful?
Why are Concave Mirrors Useful?
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Convex Mirror Image
Convex Mirror Image
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Concave lens
Concave lens
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Convex lens
Convex lens
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Candle in Water Illusion
Candle in Water Illusion
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Laughing Gallery Mirrors
Laughing Gallery Mirrors
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Medical Mirrors
Medical Mirrors
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Object-Image Game
Object-Image Game
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Role Play Game
Role Play Game
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Mirrors as Weapons
Mirrors as Weapons
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Who is Archimedes?
Who is Archimedes?
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Study Notes
Chapter 11: Light
- The observation of light beams, like sunlight through openings or beams from torches/ vehicles, suggest light travels.
Light Travels Along a Straight Line
- An activity involving viewing a candle through straight and bent pipes demonstrates that light travels in straight lines.
Reflection of Light
- Light's direction can be changed by allowing it to fall on a shiny surface.
- Shiny surfaces such as stainless steel or water can act as mirrors, altering light's path.
- Reflection of Light is the change of direction of light by a mirror.
Activity 11.1
- A torch covered with chart paper with narrow slits is used to demonstrate light reflection.
Activity 11.2
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Lighted candles should be handled with care and under supervision.
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A candle placed in front of a plane mirror creates an image that appears behind the mirror.
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The candle itself is the object, and its likeness in the mirror is its image.
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Paheli questions what makes how objects become visible.
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Boojho suggests objects are seen when light reflected from them reaches our eyes.
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An image formed by a plane mirror is erect and of the image looks to be the same size as the object.
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An image of a candle cannot be obtained on a screen placed behind of in front of the mirror.
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The image distance from the plane mirror is at the same distance as where the object is in front of it.
Activity 11.3
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Placing an item on a chessboard, a small objet can determine the distance of the image from a mirror.
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In a plane mirror, the image appears behind the mirror, which is erect with the same size, and at the same distance.
Right or Left
- When viewing in a plane mirror, the image is not exactly the same; the sides are inverted.
Activity 11.4
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Raising the left hand while standing in front of a mirror makes the image to appear raising the right hand
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The word "AMBULANCE" written in reverse on vehicles appears correctly in the rearview mirror of other drivers.
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Side mirrors in vehicles create smaller images of objects.
Spherical Mirrors
- Both stainless steel plates and spoons mirrors. They can form erect images that appear to be different sizes.
- The curved, shining surface of a spoon works as a mirror.
Activity 11.5
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Viewing your image in a spoon's outer side vs. its inner side shows different image characteristics regarding size and whether or not the mage is erect.
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Spherical mirrors is the term for those that have curved reflective surfaceds.
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A Concave mirror: is one whose reflecting surface is spherical mirror concave.
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A Convex mirror: is one where the mirror is spherical mirror convex.
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The inner surface of a cut ball is called concave, while the outer surface is called convex.
Activity 11.6
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Conducting this activity require caution, and one should never look directly at the sun, directly or its image.
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The image of an object formed by a plane mirror cannot be obtained on a screen.
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A bright spot formed by a concave mirror is the image of the Sun and is a real image because it is formed on screen
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Images formed by a plane mirror are called "virtual images," as they cannot be caught on the screen.
Activity 11.7
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Requires fixating a concave mirror and a cardboard screen.
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It is dangerous to stare directly and its image to prevent damage to the eyes.
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Mirrors used in torches, headlights of cars, and scooter reflects are concave in formation.
Activity 11.8
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In this activity, you will use the mirror to focus light. This is a repeat activity.
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Image formed by a concave mirror for object placed at different distances from it. If placed too close, candle will burn!
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Boojho noticed that the image was erect and smaller in size on his bicycle which indicates that it is convex.
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Mirrors on the side of the vehicles allow one to enlarge the images of the object. Convex mirrors are used in the side mirrors.
Images Formed by Lenses
- Magnifying glasses are typically used to read small and fine print and see parts of insects.
- Lenses are used in spectacles, telescopes and microscopes. A convex lens is is thicker in the middle and thinner at the edges
- Caution must be observed when using lenses as staring at the sun can be damaging.
Activity 11.9
- This activity is to use adjust bright spots with a convex lens or magnifying glass.
- A convex lens converges (bends inward) the light generally falling on it.
- A Concave Lens diverge (bends outward the light and is called a diverging lens
Activity 11.10
- Position and fix a convex lens and observe what the light produced and does after.
- Adjust the paper screen to see the flame. Try to get a real or virtual image.
Sunlight - White or Colored
- Rainbows usually appear during or after train when the sun is low
- When observed carefully, there are seven colours in a rainbow: red, orange, yellow, green, blue indigo and violet.
- The sunlight is a mixture of different colours, like the colourful appearance of soap bubbles after/ during the light.
Activity 11.11
- Take a prism and see how it will work, taking it narrow of sunlight and placing it in a dark room.
- Paheli suggests you only see a reflection if you have your back towards the sun.
Activity 11.12
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It is to find out about mixing colors. Take a cardboard disc, divide it into seven segments, then paint it as shown.
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White light consist of seven rainbow segments, and paint them as shown in activity.
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Description
This quiz tests your knowledge of light reflection, mirrors, and how light travels. It covers reflection principles, types of mirrors, and the behavior of light.
