Physics · Science General

Optics and Light Properties

2,019 Questions

Optics and light properties focus on the behavior of light, including reflection, refraction, dispersion, and polarization. This topic also covers the wave nature of light, illumination, and the functioning of optical instruments like microscopes. Questions on these concepts are common in general science sections of SSC, Railways, and State exams.

Reflection and mirrorsRefraction and mediumsLight wave theoriesPolarization and intensity

Optics and Light Properties Questions

Multiple choice evs light and shadow dual nature of light nature and sources of light theories on light

Choose the correct option about light.

  1. Light requires a material medium to travel from one place to another

  2. Light does not require a material medium to propagate

  3. Light has mass but it is negligible

  4. Light waves are longitudinal wave
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Light does not need medium to travel. Its an electromagnetic wave. All electromagnetic waves travel independent of medium.

Multiple choice evs light and shadow dual nature of light nature and sources of light theories on light

During the $19th$ century, light was considered to be a stream of particles called :

  1. atoms

  2. electrons

  3. corpuscles

  4. quantas
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The corpuscular theory of light is proposed by newton in 1704. It is referred as particle theory or newton’s theory of light.

According to this theory,

a. Light is made up of tiny particles called corpuscles having negligible mass. These particles (corpuscles) are perfectly elastic.

b.These tiny particles always travel in straight line in all directions.

c. These corpuscles ravel at very high velocity.

These corpuscles are of different sizes. The different color of light is due to different sizes. 

Multiple choice evs light and shadow dual nature of light nature and sources of light theories on light

By corpuscular theory of light, the phenomenon which can be explained is ____________.

  1. refraction

  2. diffraction

  3. interference

  4. polarisation
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Refraction

According to newton, when corpuscles approach the refracting surface , they are attracted near the surface. When they enter the denser medium from a rarer medium, their speed increases and hence change their direction.

Multiple choice evs magic with mirrors dual nature of light nature and sources of light theories on light

Newton postulated his corpuscular theory of light on the basis of:

  1. Newton's rings.

  2. rectilinear propagation of light.

  3. colour through thin films.

  4. Dispersion of white light into colours.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

According to Isaac Newton the geometric nature of reflection and refraction of light could only be explained if light was made of particles, referred to as corpuscles that travel in straight line.

Multiple choice evs magic with mirrors dual nature of light nature and sources of light theories on light

Newton's corpuscular model of light.

  1. successfully explain the rectilinear propagation of light, reflection of light and refraction of light

  2. does not explain the phenomena of interference of light, diffraction of light and polarisation of light

  3. is based upon particle theory of light

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

Newton's corpuscular theory successfully explained rectilinear propagation, reflection, and refraction, but failed to explain interference, diffraction, and polarization.

Multiple choice evs magic with mirrors dual nature of light nature and sources of light theories on light

Which of the following statements applies to light?

  1. Light can only be described as particles.

  2. Light can only be described as waves.

  3. Light can be described as rays, waves and particles.

  4. Light can only be described as rays.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

We can observe various phenomenon of light which cannot be explained by wave nature of light and photon nature of light some of the phenomenon are listed below:
Nature of light:                                          Phenomenon:
Ray                                                                 Reflection, Refraction
Wave                                                               Diffraction, Interference
Particle                                                  Oscillation frequency of radio waves.

Multiple choice evs magic with mirrors dual nature of light nature and sources of light theories on light

Which of the following statements about the behaviour of light is not correct?

  1. Interference patterns are evident for light behaving as rays.

  2. Ray properties of light are useful for understanding how images are formed by optical devices such as eyes.

  3. Wave properties are important for observing the behaviour of light at a fine scale.

  4. Both wave and particle theories of light can be related to the colour sensations produced by light.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Interference patterns are explained using wave nature of light. You can learn more from youtube video "Interference of light".