Question 251 markMCQSection B

$Study the following ray diagram: In this diagram, the angle of incidence, the angle of emergence and the angle of deviation respectively have been represented by$

Also asked in:2017

The Human Eye and the Colourful World

Refraction of Light

Options

(A)

y, p, z

(B)

x, q, z

(C)

p, y, z

(D)

p, z, y

Official answer

The angle of incidence is the angle at which a light ray enters a medium. In this diagram, it is represented by x. The angle of emergence is the angle at which a light ray leaves a medium. In this diagram, it is represented by q. The angle of deviation is the angle between the incident ray and the emergent ray. In this diagram, it is represented by z.

angle of incidence

angle of emergence

angle of deviation

Marking scheme

1. $Identify the angles in the diagram$
2. $Match the angles with the definitions of angle of incidence, angle of emergence, and angle of deviation$

Hint

$Identify the angles in the diagram and match them with the definitions of angle of incidence, angle of emergence, and angle of deviation.$

Quick oral answer

$The angle of incidence is the angle at which a light ray enters a medium. In this diagram, it is represented by x. The angle of emergence is the angle at which a light ray leaves a medium. In this diagram, it is represented by q. The angle of deviation is the angle between the incident ray and the emergent ray. In this diagram, it is represented by z.$

Common mistakes

1. $Confusing the angles in the diagram$
2. $Not matching the angles with the correct definitions$

Analysis and explanation

The correct answer is B because the angle of incidence is represented by x, the angle of emergence is represented by q, and the angle of deviation is represented by z.

Interesting facts

$The angle of deviation is related to the refractive index of the medium.$

$The angle of incidence and angle of emergence are equal when the light ray passes through a medium with the same refractive index.$

Question details

Q25 of 33 questions

Board: CBSE
Class: Class 10
Subject: Science
Year: 2017
Section: Section B
Marks: 1
Type: MCQ
Chapter: The Human Eye and the Colourful World
Topic: $Refraction of Light$
Also asked in: 2017
Bloom's level: Knowledge
Syllabus topic: $Refraction through a Prism$

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Frequently asked questions

$How many marks does this question carry in CBSE Class 10 Science 2017?$

$This question carries 1 mark in the CBSE Class 10 Science 2017 examination.$

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

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

$What topic does this question cover in Science?$

$This question covers the topic "Refraction of Light" from CBSE Class 10 Science.$

$Has this question appeared in other CBSE Science papers?$

$Yes, a similar question appeared in the 2017 CBSE Class 10 Science paper.$

$What type of question is this in the CBSE Class 10 Science 2017 paper?$

$This is a MCQ question from Section B in the CBSE Class 10 Science 2017 paper.$