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# HC Verma Dispersion and Spectra Solutions (Chapter 20)

HC Verma Solutions for Class 11 Physics Part-1 Chapter 20 ‘Dispersion and Spectra’ covers all the important topics of the chapter for exams. HC Verma Dispersion and Spectra Solutions provided by Instasolv includes detailed solutions to the questions of this chapter. These questions are related to the main topics including dispersion, dispersive power, spectrum, kinds of spectra, spectrometer, rainbow, ultraviolet and infrared spectrum, and dispersion without average deviation and average deviation without dispersion.

The HC Verma Solutions Concepts of Physics Part 1 Dispersion and Spectra Solutions consists of a total of 4 exercises with 27 different types of questions. By providing a complete set of solutions that cover different kinds of questions from objective type questions to short and long answer type questions amongst others, the subject matter experts at Instasolv bring for you an avenue to get help and improve your scoring in the CBSE Physics exam as well as help you in JEE Mains preparation.

All you have to do is take the help from HC Verma Dispersion and Spectra Solutions to practice the exercises on a regular basis. Even the revision notes can guide you to revise smartly just before your exams. All the solutions are written as per the CBSE exam pattern which will make it easier for you to prepare for your exams.

### Important Topics for HC Verma Concepts of Physics Part-1 Solutions Chapter 20: Dispersion and Spectra

Dispersion

Dispersion refers to any method related to the propagation of individual waves at speeds that are determined with their wavelengths. Any translucent medium like a glass prism will cause an incident parallel beam of light to fan out permitting the refractive index of the glass for each of the constituent wavelengths, or colours. Sometimes dispersion is also referred to as the separation of light into colours and an effect precisely known as angular dispersion.

Spectrum

A condition that is not restricted to a particular set of values but can be different, without steps across the continuum is known as a spectrum. The word spectrum is used scientifically in optics to describe the colours of the rainbow in visible light after passing through a prism.

Kinds of spectra

An object can discharge mainly three types of spectra including absorption, continuous, and emission spectra.

• Continuous spectra are also known as blackbody or thermal spectra which emits any object that radiates heat.
• Emission spectra take place when the molecules and atoms in a hot gas produce extra light at particular wavelengths that cause bright lines to become visible in spectra.

Ultraviolet and Infrared Spectrum

The ultraviolet and the infrared signifies the two extremities of the visible spectrum (400 -700 nm). The ultraviolet shows electromagnetic radiation with wavelengths shorter than those of visible light but infrared shows wavelengths longer than visible light.

Spectrometer

A device that helps to measure wavelengths of light over a wide range of the electromagnetic spectrum is called a spectrometer. For spectroscopic analysis of sample materials, a spectrometer is a device that is widely used. The light source can be reflected transmitted or absorbed through the sample for the incident light.

Rainbow

The climatic sensation which is formed by refraction, reflection, and dispersion of light in water droplets arising in a spectrum of light occurring in the sky is known as a rainbow. Rainbow is in the form of a multi-coloured circular arc.

### Exercise-wise Discussion for HC Verma Concepts of Physics Part-1 Solutions Chapter 20: Dispersion and Spectra

Exercise 1 – Short Answer Type Questions

This exercise of HC Verma Concepts of Physics Dispersion and Spectra has around 6 questions which are short answer type questions. Practising these questions will help you clear your concepts.

Exercise 2 – Objective Type Questions I

Exercise 2 of HC Verma Part 1 Dispersion and Spectra Solutions consists of 5 questions that are multiple-choice questions.

Exercise 3 – Objective Type Questions II

This exercise set has a total of 5 questions. Here, you will find the objective type questions, which will help you improve your high-level thinking capability.

Exercise 4 – Long Answer Type Questions

Exercise 4 of HC Verma Dispersion and Spectra Solutions for Concepts of Physics Part 1 consists of a total of 11 questions which are long answer type questions. Practising these questions will help you in preparing for your CBSE exams as well as for the competitive exams.

## Why Use HC Verma Concepts of Physics Part-1 Solutions Chapter 20: Dispersion and Spectra by Instasolv?

• At Instasolv, we provide you with a brief description of all the questions available in HC Verma Class 11 Physics Solutions Part 1 Dispersion and Spectra. This will help you to have an overall understanding of the chapter.
• The HC Verma Dispersion and Spectra Solutions provided by Instasolv always promote a real understanding of the chapter.
• We always suggest you practice all the solved examples given in between the chapters.
• A quick solution to any problem of this chapter can be identified by our team of experts having great experience in the field.
• By practising these solutions, you will become more confident to sit in the CBSE as well as the competitive exams.
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