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 what makes things visible nature and sources of light light travels in straight line

The amount of light reflected depends upon

  1. the nature of material of the object

  2. the nature of the surface

  3. the smoothness of the surface

  4. all the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The amount of light reflected depend upon the properties of the material and the surface polished.Hence reflection depends upon the smoothness of the material at which light is incident.

Multiple choice evs light and shadow what makes things visible nature and sources of light light travels in straight line

The ray of light which falls on a mirror is called-

  1. Reflected ray

  2. Emergent ray

  3. Incident ray

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

A $ \textbf{reflected ray}$ is a ray of light that represents the light reflected by the surface or the ray of light that bounces off the mirror.

An $ \textbf{emergent ray} $ is a ray of light which finally emerges out of the other medium back to the original medium.

An $\textbf{incident ray}$ is a ray of light approaching the mirror or falling on the mirror.

A $\textbf{transmitted ray} $ or a refracted ray is a ray of light that is transmitted into the second medium and undergoes a change of velocity and direction due to the interaction with the material medium in which it travels.

Hence, the correct answer is OPTION C. 

Multiple choice evs light and shadow what makes things visible nature and sources of light light travels in straight line

Objects which emit light of their own are called -

  1. non- luminous objects

  2. transparent objects

  3. translucent objects

  4. luminous objects
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Objects which do not emit light on their own are called  $ \bf{non-luminous}$ objects.

Objects which allow the light to pass through them completely without any obstruction are called $ \bf{transparent} $ objects.

Objects which allow the light to pass through them partially are called $ \bf{translucent} $ objects.


Objects that give out or emit light of their own are called as $ \bf{luminous} $ objects. 

Hence, the correct answer is OPTION D. 

Multiple choice evs light, shadows and images what makes things visible nature and sources of light light travels in straight line

We are able to see objects around us because ______________.

  1. The objects absorb all the light

  2. The light reflected from the object enters our eyes

  3. Light can be reflected

  4. Light travels in straight lines
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

An object is visible to us only if light reflected or emitted by it reaches our eye and image is formed at retina.

Multiple choice evs light, shadows and images what makes things visible nature and sources of light light travels in straight line

When a light ray is reflected repeatedly by a set of parallel plane mirrors, the intensity of light rays decreases after some reflections. This is because of

  1. Poor reflection from mirrors

  2. Absorption of some amount of light by mirrors

  3. Dispersion of light when the rays travel through the atmosphere

  4. Scattering of light by the mirrors
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The intensity of the light is decreased because no surface is perfectly reflecting surface. When the light is incident on a reflecting surface some part of the light is observed, resulting in decrease in the intensity.

Multiple choice evs light, shadows and images what makes things visible nature and sources of light light travels in straight line

Choose the correct option regarding luminous objects

  1. All objects which glow are luminous objects

  2. Objects which is not source of light is luminous objects

  3. Objects which glow can be luminous objects

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

Luminous objects can be defined as objects which emit their own light by use of some reactions or energy source.

Multiple choice evs light, shadows and images what makes things visible nature and sources of light light travels in straight line

How are non luminous objects visible to eye ?

  1. Non-luminous objects give away light

  2. Non-luminous objects reflect the light falling on them

  3. Non-luminous objects disperse the light falling on them

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

Non-luminous objects reflect the light falling on them and the reflected light are sensed by the eye and thus we are able to see non-luminous objects.