Tag: laws of reflection

Questions Related to laws of reflection

When all the parallel rays reflected from a mirror are parallel, the reflection is known as:

physics reflection of light and shadow regular and irregular reflection regular and diffused reflection laws of reflection

  1. regular reflection

  2. irregular reflection

  3. diffused reflection

  4. none of these

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Correct Option: A
Explanation:

In regular reflection, parallel rays of light, after reflection, emerge as parallel.

Irregular reflection _______ laws of reflection.
physics reflection of light and shadow regular and irregular reflection regular and diffused reflection laws of reflection

  1. obeys

  2. violates

  3. obeys sometimes

  4. violates sometimes

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Correct Option: A
Explanation:

Irregular reflection always obeys laws of reflection.

You are able to see in shaded areas, such as under a tree, because light has undergone:

physics reflection of light and shadow regular and irregular reflection regular and diffused reflection laws of reflection

  1. refraction

  2. incident bending

  3. a change in speed

  4. diffused reflection

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Correct Option: D
Explanation:

In a diffused or irregular reflection, parallel rays of light, after striking a rough and curved surface, get reflected irregularly.

Which surfaces are said to be smooth?

physics reflection of light and shadow regular and irregular reflection regular and diffused reflection laws of reflection

  1. As long as the irregularities of surfaces are small as compared to the wavelength of the incident light.

  2. As long as surface irregularities are large compared to the wavelength of the incident light.

  3. As long as surface smoothness are small as compared to wavelength of reflected light

  4. As long as the surface irregularities are large as compared to the wavelength of reflected light.

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Correct Option: A
Explanation:

A surface behaves as a smooth surface as long as the surface irregularities are small compared with the wavelength of the incident light.

Light reflecting from surface of sea rocks is an example of:

physics reflection of light and shadow regular and irregular reflection regular and diffused reflection laws of reflection

  1. Regular reflection

  2. Diffused reflection

  3. Total internal reflection

  4. None of these

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Correct Option: B
Explanation:

When a light ray is reflected in many directions from a surface like a rock, it is called as diffused (or Irregular) reflection.

The change in reflected wave, when light wave suffers reflection at the interface from air to glass is?

physics reflection of light and shadow regular and irregular reflection regular and diffused reflection laws of reflection

  1. $0$

  2. $\dfrac{\pi}{2}$

  3. $\pi$

  4. $2\pi$

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Correct Option: C
Explanation:
When light wave suffers reflection at the interface from air to glass, the change in phase of the reflected wave is equal to π
Hence the option C is the right answer

The reflection taking place from the walls of a building is called:

physics reflection of light and shadow regular and irregular reflection regular and diffused reflection laws of reflection

  1. regular reflection

  2. diffused reflection

  3. multiple reflection

  4. internal reflection

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Correct Option: B
Explanation:

The reflection taking place from the walls of a building is called diffused reflection.
In diffused reflection, the reflected rays are not parallel to each other. This kind of reflection occurs from a coarse surface. Walls of a building being coarse surfaces, give rise to diffused reflections.

The phenomenon of light coming back after hitting a smooth plane surface is:

physics reflection of light and shadow terms related with reflection terms related to reflection of light laws of reflection

  1. reflection

  2. refraction

  3. dispersion

  4. total internal reflection

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Correct Option: A
Explanation:

Reflection is defined as the optical phenomenon where light rays come back after hitting a smooth surface.

.......... occurs when a light ray bounces back from a barrier.

physics reflection of light and shadow terms related with reflection terms related to reflection of light laws of reflection

  1. Refraction

  2. Reflection

  3. Dispersion

  4. Scattering

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Correct Option: B
Explanation:

Reflection occurs when a light ray bounces back from a barrier.

A ray of light which bounces off the surface of mirror is called :

physics reflection of light and shadow terms related with reflection terms related to reflection of light laws of reflection

  1. Normal

  2. Incident ray

  3. Reflected ray

  4. Irregular ray

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Correct Option: C
Explanation:

A ray of light which bounces off the surface of mirror is called reflected ray.