Question 242 marksVery Short AnswerSection B

$(a) When and where does a rainbow appear in the sky? Draw a labelled ray diagram to show its formation. OR (b) What is scattering of light? Why does the clear sky appear blue?$

Q: (a) When and where does a rainbow appear in the sky? Draw a labelled ray diagram to show its formation. OR (b) What is scattering of light? Why does the clear sky appear blue?

(a) A rainbow appears in the sky when the sun is shining brightly and there are water droplets in the air. The formation of a rainbow can be explained by the dispersion of sunlight by the water droplets. OR (b) Scattering of light is the phenomenon by which light is dispersed in different directions by the particles of a medium. The clear sky appears blue because of the scattering of sunlight by the tiny molecules of gases in the atmosphere.

The Human Eye and the Colourful World

Dispersion of White Light by a Glass Prism

Official answer

(a) A rainbow appears in the sky when the sun is shining brightly and there are water droplets in the air. The formation of a rainbow can be explained by the dispersion of sunlight by the water droplets. OR (b) Scattering of light is the phenomenon by which light is dispersed in different directions by the particles of a medium. The clear sky appears blue because of the scattering of sunlight by the tiny molecules of gases in the atmosphere.

rainbow

dispersion

scattering of light

Marking scheme

1. $2 marks$

Hint

$A rainbow is a spectrum of light that appears in the sky when the sun is shining brightly and there are water droplets in the air.$

Quick oral answer

$A rainbow appears in the sky when the sun is shining brightly and there are water droplets in the air. The formation of a rainbow can be explained by the dispersion of sunlight by the water droplets. Scattering of light is the phenomenon by which light is dispersed in different directions by the particles of a medium. The clear sky appears blue because of the scattering of sunlight by the tiny molecules of gases in the atmosphere.$

Common mistakes

1. $The clear sky appears blue because of the reflection of sunlight by the tiny molecules of gases in the atmosphere.$

Analysis and explanation

A rainbow appears in the sky when the sun is shining brightly and there are water droplets in the air. The formation of a rainbow can be explained by the dispersion of sunlight by the water droplets. Scattering of light is the phenomenon by which light is dispersed in different directions by the particles of a medium. The clear sky appears blue because of the scattering of sunlight by the tiny molecules of gases in the atmosphere.

Interesting facts

$A rainbow is a spectrum of light that appears in the sky when the sun is shining brightly and there are water droplets in the air.$

Question details

Q24 of 39 questions

Board: CBSE
Class: Class 10
Subject: Science
Year: 2023
Section: Section B
Marks: 2
Type: Very Short Answer
Chapter: The Human Eye and the Colourful World
Topic: $Dispersion of White Light by a Glass Prism$
Bloom's level: Understanding
Syllabus topic: $Dispersion of White Light by a Glass Prism$

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Frequently asked questions

$How many marks does this question carry in CBSE Class 10 Science 2023?$

$This question carries 2 marks in the CBSE Class 10 Science 2023 examination.$

$Which chapter does this question come from in Science?$

$This question is from the chapter "The Human Eye and the Colourful World" in the CBSE Class 10 Science syllabus.$

$What topic does this question cover in Science?$

$This question covers the topic "Dispersion of White Light by a Glass Prism" from CBSE Class 10 Science.$

$What type of question is this in the CBSE Class 10 Science 2023 paper?$

$This is a Very Short Answer question from Section B in the CBSE Class 10 Science 2023 paper.$