Light and Mirrors Quiz
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Questions and Answers

Which of the following is NOT a component of Ontario's Climate Plan?

  • Sustainable building materials
  • Increased fossil fuel use (correct)
  • Improved energy efficiency in buildings
  • Waste reduction and recycling

Transportation is one of the largest sources of greenhouse gas emissions in Canada.

True (A)

What is the definition of a luminous object?

An object that produces its own light.

Incandescence is the light produced by a ______ object.

<p>hot</p> Signup and view all the answers

Match the following examples with their corresponding categories of light objects:

<p>Sun = Luminous Object Mirror = Non-Luminous Object Candle = Incandescent Object Moon = Non-Luminous Object</p> Signup and view all the answers

What type of image is formed by a converging mirror when it is located between C and F?

<p>Smaller and inverted (B)</p> Signup and view all the answers

The image produced by a diverging mirror is larger than the object.

<p>False (B)</p> Signup and view all the answers

What is the image attitude when a real image is formed at point C by a converging mirror?

<p>Inverted</p> Signup and view all the answers

The image formed by a diverging mirror is always __________.

<p>virtual</p> Signup and view all the answers

Match the characteristics of the image formed by a converging mirror to their descriptions:

<p>Image size - Same size = At C Image size - Smaller = Between C and F Image size - Larger = Inside F Attitude - Upright = Diverging mirror</p> Signup and view all the answers

What is a key difference between phosphorescence and fluorescence?

<p>Phosphorescence glows longer after the light is gone. (B)</p> Signup and view all the answers

Incandescent bulbs produce light without generating heat.

<p>False (B)</p> Signup and view all the answers

What type of material allows no light to pass through?

<p>Opaque</p> Signup and view all the answers

A _____ allows some light to pass but does not allow clear visibility.

<p>translucent material</p> Signup and view all the answers

Match the following terms about light with their correct descriptions:

<p>Transparent = Allows light to pass through fully Translucent = Allows some light to pass but not clearly Opaque = Allows no light to pass through Reflective surface = Bounces light rays off its surface</p> Signup and view all the answers

What type of reflection occurs when light scatters in many directions off a surface like paper?

<p>Diffuse reflection (D)</p> Signup and view all the answers

The angle of incidence is always different from the angle of reflection.

<p>False (B)</p> Signup and view all the answers

What is the attitude of the image formed by a concave mirror?

<p>Upright</p> Signup and view all the answers

In specular reflection, light reflects off a ______ surface in one direction.

<p>smooth</p> Signup and view all the answers

Match the following types of reflections with their descriptions:

<p>Specular reflection = Light reflects off a smooth surface in one direction. Diffuse reflection = Light scatters in many directions off a rough surface. Virtual image = Image formed appears to be behind the mirror. Concave mirror = Can form both real and virtual images depending on the object position.</p> Signup and view all the answers

What is the formula for the index of refraction (n)?

<p>n = C/V (C)</p> Signup and view all the answers

Total internal reflection can occur when light travels from a less dense medium to a denser medium.

<p>False (B)</p> Signup and view all the answers

What is the critical angle for total internal reflection in the example provided?

<p>34.4°</p> Signup and view all the answers

The speed of light in a vacuum is approximately ______ m/s.

<p>3.00 x 10^8</p> Signup and view all the answers

Match the following types of light phenomena with their descriptions:

<p>Refraction = Bending of light as it passes from one medium to another Total internal reflection = Light reflects completely back into a denser medium Critical angle = Minimum angle of incidence for total internal reflection Index of refraction = Ratio of the speed of light in a vacuum to its speed in a medium</p> Signup and view all the answers

What is the correct relationship expressed by the thin lens equation?

<p>$di = rac{1}{f} ± rac{1}{do}$ (A)</p> Signup and view all the answers

The image formed by a microscope is always upright.

<p>False (B)</p> Signup and view all the answers

What is the focal length of a lens if the object distance is 53 cm and the image distance is 27.3 cm?

<p>27.3 cm</p> Signup and view all the answers

A camera produces a __________ image that is smaller and inverted.

<p>smaller</p> Signup and view all the answers

Match the following lens types with their characteristics:

<p>Camera = Smaller, inverted, real Projector = Larger, inverted, real Magnifying glass = Larger, upright, real Microscope = Larger, inverted, virtual Telescope = Larger, inverted, real</p> Signup and view all the answers

Which of the following correctly describes a converging lens?

<p>Brings light rays together (C)</p> Signup and view all the answers

A diverging lens has a positive focal point.

<p>False (B)</p> Signup and view all the answers

What are the three main components labeled in the diagrams of both lens types?

<p>Optical center, focal point (F), principal axis</p> Signup and view all the answers

The path of light rays through a ______ lens diverges.

<p>diverging</p> Signup and view all the answers

Match the following terms with their definitions:

<p>Converging Lens = Brings light rays together Diverging Lens = Spreads light rays apart Optical Center = The center where light rays converge Focal Point (F) = Point where rays meet or appear to meet</p> Signup and view all the answers

What type of image is formed when an object is located beyond $2F$ using a converging lens?

<p>Real and inverted (A)</p> Signup and view all the answers

An object located between $F$ and $2F$ results in a virtual and larger image.

<p>True (A)</p> Signup and view all the answers

What happens to light rays that pass through the center of a converging lens?

<p>They continue straight.</p> Signup and view all the answers

When an object is at $2F$, the image formed is _____ and of _____ size compared to the object.

<p>inverted, same</p> Signup and view all the answers

Match the following scenarios to the type of image formed:

<p>Object between $F$ and $2F$ = Virtual, upright, larger Object at $2F$ = Real, inverted, same size Object beyond $2F$ = Real, inverted, smaller Object closer to the lens than $F$ = Virtual, upright, larger</p> Signup and view all the answers

Flashcards

Sustainable farming practices

The practice of using less synthetic fertilizers to reduce greenhouse gas emissions and promote sustainable agriculture.

Incandescent Objects

Objects that radiate light due to their high temperature.

Non-Luminous Objects

Objects that do not produce their own light but reflect light from other sources.

Ontario's Climate Plan

A plan focused on reducing Ontario's climate impact by promoting sustainable practices in various sectors.

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Reduced Consumption at Home

The process of reducing the amount of resources consumed by individuals and households.

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What is a converging mirror?

A converging mirror is a curved mirror that reflects light inwards, causing it to converge at a point called the focal point.

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What happens to the image formed by a converging mirror?

A converging mirror creates an inverted image when the object is located beyond the focal point.

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Where is the image located in a converging mirror?

The location of the image formed by a converging mirror depends on the object's distance from the mirror.

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What is a diverging mirror?

A diverging mirror is a curved mirror that reflects light outwards, causing it to spread.

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What kind of image does a diverging mirror create?

A diverging mirror always creates a virtual, upright, and smaller image behind the mirror.

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Index of Refraction (n)

The ratio of the speed of light in a vacuum to the speed of light in a medium. It represents how much light slows down when entering the medium.

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Refraction

The bending of light waves as they pass from one medium to another, due to a change in speed.

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Total Internal Reflection

The phenomenon where light traveling from a denser medium to a less dense medium is completely reflected back into the denser medium, occurring when the angle of incidence exceeds the critical angle.

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Critical Angle

The minimum angle of incidence at which total internal reflection occurs.

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Conditions for Total Internal Reflection

When light travels from a denser medium to a less dense medium, and the angle of incidence is greater than the critical angle, it undergoes total internal reflection.

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Transparent Material

A material that allows all light to pass through it.

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What is the incident ray?

The ray of light that hits a reflecting surface.

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Translucent Material

A material that allows some light to pass through, but not clearly, creating a blurry image.

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Angle of Incidence

The angle between the incident ray and the normal.

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Opaque Material

A material that does not allow any light to pass through.

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Focal length (f)

The distance between the lens and the point where parallel light rays converge after passing through the lens.

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Object distance (do)

The distance between the lens and the object.

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Image distance (di)

The distance between the lens and the image formed.

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Thin Lens Equation

A formula used to calculate the relationship between focal length, object distance, and image distance for a thin lens.

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Converging Lens

A lens that converges parallel light rays to a single point (the focal point).

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Law of Reflection

The angle at which light strikes a surface is equal to the angle at which it reflects off the surface. The incident ray, reflected ray, and the line perpendicular to the surface (normal) all lie in the same plane.

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Specular Reflection

Light bounces off a smooth surface in a single direction, creating a clear reflection.

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Diffuse Reflection

Light scatters in various directions when it hits a rough surface, resulting in a blurred reflection.

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Virtual Image

An image formed by a concave mirror where the light rays do not actually converge at the image point, but appear to diverge from it.

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Rules for a Concave Mirror

Rules that describe how light rays interact with a concave mirror. They help predict the location and characteristics of the image formed.

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Diverging Lens

A lens that causes parallel light rays to diverge as if they originated from a point called the focal point.

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Focal Point (F)

The point on the principal axis of a lens where parallel rays of light converge after passing through the lens.

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Principal Axis

The line passing through the center of the lens and perpendicular to its surfaces.

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Optical Center

The point at the center of the lens where the principal axis intersects.

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Converging Lens: Light Ray Rule 1

For converging lenses, parallel light rays pass through the focal point (F') after refraction. This is a key rule in ray tracing diagrams.

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Converging Lens: Light Ray Rule 2

When light passes through the focal point (F) of a converging lens, it emerges parallel to the principal axis. This rule is fundamental for understanding how lenses focus light.

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Converging Lens: Light Ray Rule 3

Light rays passing through the center of a lens continue traveling in a straight line without bending. This is due to the symmetry of the lens.

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Converging Lenses: Image Formation

Converging lenses can form both real and virtual images, depending on the object's position relative to F. Real images are formed when light rays actually converge at a point, whereas virtual images are formed where rays appear to diverge.

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Object Beyond 2F: Converging Lens

When an object is placed beyond twice the focal length (2F) of a converging lens, the resulting image is real, inverted, and smaller than the object. This occurs because the light rays converge before reaching the focal point (F').

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Study Notes

Light and Reflection

  • Light sources are categorized into luminous and non-luminous
  • Luminous objects produce their own light (e.g., sun, light bulb)
  • Non-luminous objects reflect light (e.g., mirrors, moon)
  • Incandescence is light produced from a hot object (e.g., candle)

Refraction

  • Refraction is the bending of light when it passes from one medium to another
  • The speed of light changes when it enters a different medium.
  • The larger the difference in mediums, the larger the change in speed.
  • Refraction is calculated using the formula n=c/v
  • Examples of mediums are glass, water
  • Formula n=c/v (index of refraction = speed of light in vacuum/speed of light in medium).
  • Example applications include how a pencil appears bent when placed in water, prisms, and rainbows.

Total Internal Reflection

  • Total internal reflection occurs when light travels from a denser medium to a less dense medium and the angle of incidence is greater than the critical angle.
  • Conditions for total internal reflection:
    • Light must travel from a denser to a less dense medium
    • Angle of incidence must be greater than critical angle.

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Description

Test your knowledge on the properties of light, including definitions, types of luminous objects, and the behavior of light with mirrors. This quiz covers concepts like incandescence, fluorescence, and image formation in converging and diverging mirrors.

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