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(a) The refractive index of glass is 1.5. What is the speed of
Physics Part-II
Physics Part-II

Class 12

NCERT

Publisher:
NCERT
Subject:
Physics
1

Chapter 1: Ray Optics and Optical Instruments

41 questions

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2

Chapter 2: Wave Optics

30 questions

Q1
What is the shape of the wavefront in each of the following cases:
(a) Light diverging from a point source.(b) Light emerging out of a convex lens when a point source is placed at its focus.(c) The portion of the wavefront of light from a distant star intercepted by the Earth.
Q2
(a) The refractive index of glass is 1.5. What is the speed of light in glass? (Speed of light in vacuum is
(b) Is the speed of light in glass independent of the colour of light? If not, which of the two colours red and violet travels slower in a glass prism?
Q3
In a Youngs double-slit experiment, the slits are separated by 0.28 mm and the screen is placed 1.4 m away. The distance between the central bright fringe and the fourth bright fringe is measured to be 1.2 cm. Detere the wavelength of light used in the experiment.
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3

Chapter 3: Dual Nature of Radiation and Matter

44 questions

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4

Chapter 4: Atoms

23 questions

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5

Chapter 5: Nuclei

38 questions

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6

Chapter 6: Semiconductor Electronics: Materials, Devices and Simple Circuits

25 questions

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Question
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Solving time: 3 mins

(a) The refractive index of glass is 1.5. What is the speed of light in glass? (Speed of light in vacuum is
(b) Is the speed of light in glass independent of the colour of light? If not, which of the two colours red and violet travels slower in a glass prism?

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Updated on: Feb 18, 2023

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Physics Part-II (NCERT)

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(a) The refractive index of glass is 1.5. What is the speed of light in glass? (Speed of light in vacuum is
(b) Is the speed of light in glass independent of the colour of light? If not, which of the two colours red and violet travels slower in a glass prism?
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(a) Speed of light in glass is
(b) The speed of light in glass is not independent of the colour of light. The refractive index of a violet component of white light is greater than the refractive index of a red component. Hence, the speed of violet light is less than the speed of red light in glass. Hence, violet light travels slower than red light in a glass prism.
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What is the shape of the wavefront in each of the following cases:
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Question Text
(a) The refractive index of glass is 1.5. What is the speed of light in glass? (Speed of light in vacuum is
(b) Is the speed of light in glass independent of the colour of light? If not, which of the two colours red and violet travels slower in a glass prism?
Updated OnFeb 18, 2023
TopicWave Optics
SubjectPhysics
ClassClass 12
Answer TypeText solution:1 Video solution: 1
Upvotes192
Avg. Video Duration6 min