HC Verma Speed of Light Solutions (Chapter 21)

HC Verma Solutions for Concepts of Physics Part-1 Chapter 21 ‘Speed of Light’ introduces you to the concepts of how fast light can travel in a medium and the time taken to reach a definite point. Further, you will study the measures of angular velocity, refractive index, distance, Fizeau Method, Michelson Method, and Foucault Method. Although, this chapter does not contain a lot of topics yet it is an interesting chapter to study for JEE and NEET.

HC Verma Speed of Light Solutions consists of 4 exercises with 14 questions. The solution of all these exercises provided at Instasolv is prepared in such a way that every step is explained clearly and in detail. These solutions can be helpful not only for the preparation of the exam but also in solving the assignments. Referring to the HC Verma Solutions for Class 11 Physics will make your competitive exam preparation a lot easier.

The solutions of HC Verma Solutions Concepts of Physics Part 1 Speed of Light are prepared by the best Physics teachers at Instasolv. The team has great experience and has an in-depth knowledge of the subject. So, if you feel stuck while preparing for Chapter 21 – Speed of Light, then refer to our solutions at any time and from anywhere. Also, you can access all these solutions for free.

Important Topics for HC Verma Concepts of Physics Part-1 Solutions Chapter 21: Speed of Light

Speed of Light

A technique of calculating the speed of light is to measure the time required for light to travel to a mirror at an identified distance and back. Calculating the distance between the wheel and the mirror, the number of teeth on the wheel and the rate of rotation, the speed of light can be calculated.

Angular Velocity

In physics, angular velocity mentions how fast a body rotates or revolves relative to another point, i.e. how fast the angular position or alignment of a body changes with time. There are two types of angular velocity including orbital angular velocity and spin angular velocity.

Refractive Index

In optics, the refractive index or index of refraction of a substance is a dimensionless number that defines how fast light travels through the substance. It is described as where c is the speed of light in vacuum and v is the phase velocity of light in the medium.


Distance is a numerical dimension of how far apart bodies or points are. In physics or everyday usage, the distance may denote a physical length or an approximation based on other criteria. In most cases, “distance from A to B” is exchangeable with “distance from B to A”.

Fizeau Method

The Fizeau experiment was released out by Hippolyte Fizeau in 1851 to calculate the relative speeds of light in moving water. Fizeau used a distinct interferometer arrangement to calculate the effect of movement of a medium upon the speed of light.

Foucault Method

The speed of light was calculated using the Foucault method of reflecting a ray of light from a rotating mirror to a fixed mirror and back producing two distinct reflected beams with an angular displacement that is connected to the time that was essential for the light beam to travel a specified distance to the fixed mirror.

Exercise-wise Discussion for HC Verma Concepts of Physics Part-1 Solutions Chapter 21: Speed of Light

Exercise 1 – Short Answer Type Questions

This exercise set of HC Verma Part 1 Speed of Light Solutions consists of a total of 5 questions which are short answer type questions.

Exercise 2 – Objective Type Questions I

Exercise 2 of HC Verma Physics Chapter 21 contains a total of 3 problems with solutions. These questions are based on the angular velocity, refractive index, distance, Fizeau Method, Michelson Method, and Foucault Method.

Exercise 3 – Objective Type Questions II

HC Verma Speed of Light Solutions contains 3 questions. These questions are based on the Michelson experiment where values of distance, refractive index are provided.

Exercise 4 – Long Answer Type Questions

This is the last exercise of Chapter 21 and has around 3 questions which are long answer type questions. Practising these questions will help you in preparing for your CBSE exams as well as in the JEE Mains preparation.

Why Use HC Verma Concepts of Physics Part-1 Solutions Chapter 21: Speed of Light by Instasolv?

  • Referring to the solutions provided by the experts at Instasolv offers you in-depth explanations for all logical reasoning questions available in the textbook.
  • All the HC Verma Part 1 Physics Solutions are accurate and to-the-point to help you clear your concepts.
  • We provide step-by-step processes to make you understand the numerical value questions with ease.
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