Tag: reflection of light and shadow

Quizzes (17) Questions (85)

Questions Related to reflection of light and shadow

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

A beam of light converges at point $P$. Now, a plane mirror is placed $20 \mathrm { cm }$ before the converging point $P$. The new converging point is

  1. $20 \mathrm { cm }$ infront of the mirror
  2. $20 \mathrm { cm }$ behind the mirror
  3. The separation between new converging point and previous converging point is $40 \mathrm { cm } $

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A converging beam directed at a point 20 cm behind a mirror will reflect and converge at a point 20 cm in front of the mirror due to the law of reflection. The mirror effectively flips the virtual image of the convergence point.

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

What is the correct definition of reflectance?

  1. Difference between amount of light absorbed by the surface and amount of light reflected.

  2. The amount of light reflected by a surface is known as reflectance.

  3. The ratio of the amount of the light reflected from a surface to the amount of light falling on the surface is called reflectance.

  4. The ratio of amount of light falling on a surface to the amount of light reflected on the surface is called reflectance.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

According to definition, ratio of the amount of light reflected from a surface to the amount of light falling on the surface is called reflectance.

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

The angle formed between the incident ray and the normal is called _____________

  1. angle of incidence

  2. angle of reflection

  3. angle of refraction

  4. none of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Angle of incidence is the angle between incident ray and normal to the reflecting surface at the point of incidence.


Answer-(A).

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

When light rays travelling from one medium fall at the surface of another medium ............ the light rays returns back to the same medium.

  1. All of

  2. Part of

  3. None of

  4. Can't be determined
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

When light rays traveling from one medium fall at the surface of another medium part of the light rays returns back to the same medium.
For example in window mirror we can see our image and we can also see outside objects because of both reflection and refraction of light.