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

Match the following:

 
a. Homogeneous medium 1. It is a medium that partially allows light energy to pass through it.
b. Heterogeneous medium 2. It is an optical medium that has different compositions at different points.
c. Translucent medium 3. It is an optical medium that has uniform composition throughout.

  1. a – 3, b – 2, c – 1

  2. a – 3, b – 1, c – 2

  3. a – 1, b – 3, c – 2

  4. a – 2, b – 3, c – 1

  5. a – 1, b – 2, c – 3
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

This is the correct option. Homogeneous medium is an optical medium that has uniform composition throughout. Heterogeneous medium is an optical medium that has different compositions at different points. Translucent medium is a medium that partially allows light energy to pass through it.

Multiple choice

Which of the following is divergent beam of light?

  1. The beam of light in which all the rays are parallel to each other

  2. The beam of light in which the rays of light starting from a large source of light get closer to each other

  3. The beam of light in which the rays of light starting from a point source move out in different directions

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

A divergent beam of light consists of rays that originate from a single point source and spread out in different directions, moving away from each other.

Multiple choice

Which of the following is convergent beam of light?

  1. The beam of light in which all the rays are parallel to each other

  2. The beam of light in which the rays of light starting from a large source of light get closer to each other

  3. The beam of light in which the rays of light starting from a point source move out in different directions

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

A convergent beam of light consists of rays that move toward each other, eventually meeting at a point. This typically happens when light passes through a converging lens or reflects off a concave mirror.

Multiple choice

Luminous objects are?

  1. Which do not emit light

  2. Which emits light

  3. Sometimes emits light

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

Luminous objects are those that produce and emit their own light, such as the sun, stars, or a lit bulb.

Multiple choice

Light is a /an?

  1. Longitudinal wave

  2. Transverse wave

  3. Electromagnetic wave

  4. b & c both
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Light is an electromagnetic wave that exhibits transverse wave properties. Therefore, it is classified as both.

Multiple choice

Non - luminous objects are?

  1. Which do not emit light

  2. Which emits light

  3. Sometimes emits light

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

Non-luminous objects do not emit their own light; they are only visible when light from a luminous source reflects off them.

Multiple choice

Which of the following is called the incident ray of light?

  1. The ray of light which falls on polished surface or a mirror

  2. The ray of light which gets reflected from a polished surface or a mirror

  3. b & c both

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

An incident ray is defined as the ray of light that strikes or falls upon a surface, such as a mirror.

Multiple choice

Which of the following is called the reflected ray of light?

  1. The ray of light which falls on polished surface or a mirror

  2. The ray of light which gets reflected from a polished surface or a mirror

  3. b & c both

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

A reflected ray is the ray of light that bounces off a surface after striking it.

Multiple choice

Light is a form of?

  1. Work

  2. Energy

  3. Distance

  4. Volume
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Light is a form of electromagnetic radiation that carries energy. It is not a physical substance like volume, nor is it a measurement of distance or work.

Multiple choice

Which of the following is called the angle of reflection?

  1. The angle made by the reflected ray with the normal

  2. The angle made by the incident ray with the normal

  3. b & c both

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

The angle of reflection is defined as the angle formed between the reflected ray and the normal line at the point of incidence.

Multiple choice

Which of the following is called the angle of incidence?

  1. The angle made by the reflected ray with the normal

  2. The angle made by the incident ray with the normal

  3. b & c both

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

The angle of incidence is defined as the angle formed between the incident ray and the normal line at the point of incidence.

Multiple choice

LASER is an acronym for light amplification by

  1. stimulated emission of radiation

  2. spontaneous emission of radiation

  3. stimulated energy radiation

  4. spontaneous emission of radio waves
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

LASER stands for Light Amplification by Stimulated Emission of Radiation. It is a device that emits light through a process of optical amplification.

Multiple choice

Old written materials, which cannot be read easily, can be read by

  1. cosmic rays

  2. ultraviolet rays

  3. infra red rays

  4. none of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Infrared rays are used in imaging techniques to reveal faded or obscured text in old manuscripts because they can penetrate surface layers and reflect differently off ink and parchment.