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 regular and irregular reflection regular and diffused reflection laws of reflection

Diffused reflection

  1. may produce image

  2. never produce image

  3. must produce image

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

Diffused reflection occurs on rough surfaces. While it scatters light, it can still form images if the surface is not perfectly irregular, though they are often less sharp than those from specular reflection.

Multiple choice physics reflection of light and shadow beam of light ray and beam ray optics

Which of the following is correct for the beam which enters the medium ? 

  1. Travel as a cylindrical beam

  2. Diverge

  3. Converge

  4. Diverge near the axis and converge near the periphery
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Since the refractive index is less at beam boundary, the ray at the edges of the beam move faster compared to the axis of beam. Hence the beam converges.

Multiple choice physics reflection of light and shadow beam of light ray and beam ray optics

If a parallel beam of light having intensity I is incident normally on a perfectly reflecting surface, the force exerted on the surface, equal F. When the surface is held at an angle $ \theta $ the force is 

  1. $ 2F tan \theta $
  2. $ F cos \theta $
  3. $ F cos^2 \theta $
  4. $ 2 F $
Reveal answer Fill a bubble to check yourself
A Correct answer
Multiple choice physics reflection of light and shadow beam of light ray and beam ray optics

The shape of spot light produced when bright sunshine passes perpendicular through a hole of very small size, is:

  1. Square because hole is square

  2. Round because it is an image of the sun

  3. Round with a small pinumbra around it

  4. Square with a small pinumbra
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

  • The spots are often oval, rather than round. That's because the sunlight is hitting the ground at an angle and the round sun images are stretching out to make ovals.
  • It's perpendicular to the sun's rays, and the spots should become round. 
  •  Hence option B is the right answer

Multiple choice physics reflection of light and shadow beam of light ray and beam ray optics

A light is said to be divergent when :

  1. all the rays travel parallel to each other

  2. all the rays spread from a point source of light

  3. all the rays converge together to a single point

  4. it travels in an irregular pattern
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

When the rays of light starting from a point travel in different directions, then the collection of such rays is termed as a divergent beam of light.

Multiple choice physics reflection of light and shadow beam of light ray and beam ray optics

A light is said to be convergent when :

  1. all the rays travel parallel to each other

  2. all the rays spread form a point source of light

  3. all the rays converge towards a single point

  4. it travels in an irregular pattern
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

When the rays of light coming from different directions meet at a point, then the collection of such rays is termed as a convergent beam of light.