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Questions and Answers
What is the focal length of the convex mirror with a radius of curvature of 3.00 m?
What is the focal length of the convex mirror with a radius of curvature of 3.00 m?
- 1.50 m (correct)
- 3.00 m
- -1.50 m
- 6.00 m
What does a positive magnification value indicate about an image?
What does a positive magnification value indicate about an image?
- The image is larger than the object.
- The image is virtual. (correct)
- The image is inverted.
- The image is real.
For the bus positioned 5.00 m from the convex mirror, what is the image distance calculated?
For the bus positioned 5.00 m from the convex mirror, what is the image distance calculated?
- 7.50 m
- 1.15 m (correct)
- -7.50 m
- -1.15 m
What can be concluded about the image of the bus in the convex mirror?
What can be concluded about the image of the bus in the convex mirror?
What is the object distance when a concave mirror has an object placed 25.0 cm away?
What is the object distance when a concave mirror has an object placed 25.0 cm away?
What is the image distance for an object placed at 25.0 cm in front of a concave mirror with a focal length of -15.0 cm?
What is the image distance for an object placed at 25.0 cm in front of a concave mirror with a focal length of -15.0 cm?
What is the nature of the image obtained from the concave mirror when the object is in front of it?
What is the nature of the image obtained from the concave mirror when the object is in front of it?
How is the size of the image related to the size of the object when using the concave mirror described?
How is the size of the image related to the size of the object when using the concave mirror described?
What type of image does a convex mirror provide?
What type of image does a convex mirror provide?
Why are convex mirrors preferred as rear-view mirrors in vehicles?
Why are convex mirrors preferred as rear-view mirrors in vehicles?
If the radius of curvature of a spherical mirror is 20 cm, what is its focal length?
If the radius of curvature of a spherical mirror is 20 cm, what is its focal length?
According to the New Cartesian Sign Convention, distances measured to the right of the origin are considered:
According to the New Cartesian Sign Convention, distances measured to the right of the origin are considered:
Which statement accurately defines the principal focus of a concave mirror?
Which statement accurately defines the principal focus of a concave mirror?
In the context of mirrors, what does a diminished image mean?
In the context of mirrors, what does a diminished image mean?
When measuring distances perpendicular to the principal axis above it, according to the sign convention, they are considered:
When measuring distances perpendicular to the principal axis above it, according to the sign convention, they are considered:
Which type of mirror can produce an erect and enlarged image of an object?
Which type of mirror can produce an erect and enlarged image of an object?
What is the formula for the refractive index of medium 1 with respect to medium 2?
What is the formula for the refractive index of medium 1 with respect to medium 2?
If the speed of light in air is represented as $c$ and the speed of light in a medium is $v$, what is the expression for the refractive index of that medium?
If the speed of light in air is represented as $c$ and the speed of light in a medium is $v$, what is the expression for the refractive index of that medium?
What does a refractive index of 1.33 for water indicate?
What does a refractive index of 1.33 for water indicate?
How is the absolute refractive index of a medium expressed in comparison to a vacuum or air?
How is the absolute refractive index of a medium expressed in comparison to a vacuum or air?
Which statement about the refractive index of crown glass is correct?
Which statement about the refractive index of crown glass is correct?
What happens to the direction of light when it travels from one medium to another at an angle?
What happens to the direction of light when it travels from one medium to another at an angle?
In the activity with the coin in water, why is it difficult to pick up the coin in one go?
In the activity with the coin in water, why is it difficult to pick up the coin in one go?
When the water is poured into the bowl with the coin, what happens to the visibility of the coin from the observer's position?
When the water is poured into the bowl with the coin, what happens to the visibility of the coin from the observer's position?
What observation can be made when looking at a straight line under a glass slab placed at an angle?
What observation can be made when looking at a straight line under a glass slab placed at an angle?
What occurs when the glass slab is placed normal to the straight line?
What occurs when the glass slab is placed normal to the straight line?
Why does the line appear raised when viewed from the top of the glass slab?
Why does the line appear raised when viewed from the top of the glass slab?
In the activity of marking the outline of the glass slab, what is the purpose of outlining it?
In the activity of marking the outline of the glass slab, what is the purpose of outlining it?
Which principle underlies the bending of light as observed in the described activities?
Which principle underlies the bending of light as observed in the described activities?
What is the power of a lens with a focal length of 2 m?
What is the power of a lens with a focal length of 2 m?
If a convex lens forms a real and inverted image that is equal to the size of the object at 50 cm, where is the object placed?
If a convex lens forms a real and inverted image that is equal to the size of the object at 50 cm, where is the object placed?
Which statement about light traveling from a denser medium to a rarer medium is correct?
Which statement about light traveling from a denser medium to a rarer medium is correct?
What does the magnification produced by a spherical mirror describe?
What does the magnification produced by a spherical mirror describe?
What is true regarding the refractive index of a medium?
What is true regarding the refractive index of a medium?
What is the primary characteristic of images formed by concave lenses?
What is the primary characteristic of images formed by concave lenses?
What holds true for the laws of reflection?
What holds true for the laws of reflection?
What happens to light when it passes through a rectangular glass slab?
What happens to light when it passes through a rectangular glass slab?
Study Notes
###Â Reflection
- A positive sign in the value of magnification means the image is virtual
- Convex mirrors always produce an erect, diminished image
- Convex mirrors have a wider field of view
- Convex mirrors are preferred as rear-view mirrors in vehicles
###Â Sign Convention for Reflection
- The pole (P) of the mirror is taken as the origin
- The principal axis of the mirror is taken as the x-axis
- Distances measured to the right of the origin are positive, while those measured to the left are negative
- Distances measured perpendicular to and above the principal axis are positive
- Distances measured perpendicular to and below the principal axis are negative
Refraction
- Light bends away from the normal when travelling from a denser to a rarer medium
- Light bends towards the normal when travelling from a rarer to a denser medium
- The coin in the bowl appears to be raised due to refraction
- The line under the glass slab appears bent at the edges due to refraction
- The refractive index of a medium is the ratio of the speed of light in air to the speed of light in the medium
###Â Lens
- Power of a lens is measured in Dioptres
- Convex lenses can produce a real inverted image.
- Concave lenses always produce a virtual, erect image, that's why they are used to correct myopia (nearsightedness)
###Â Key Formula
- Mirror Formula: 1/v + 1/u = 1/f, where:
- v is the image distance
- u is the object distance
- f is the focal length
- Magnification: m = h'/h = -v/u, where:
- h' is the image height
- h is the object height
- Refractive Index: n = c/v, where:
- c is the speed of light in air
- v is the speed of light in the medium
Important Facts
- Light travels in straight lines.
- Light travels with a speed of 3x10^8 m/s in a vacuum.
- Speed of light changes in different media.
- The emergent ray after refraction through a rectangular slab is parallel to the incident ray.
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Description
Test your understanding of the principles of reflection and refraction in this quiz. Explore concepts related to convex mirrors, sign conventions, and how light behaves when passing through different mediums. Perfect for students studying optics in physics.
