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Suppose white light falls on a double slit but one slit is cov
Concepts of Physics by H. C. Verma
Concepts of Physics

Class 11

HC Verma Part I

Author:
H. C. Verma
Subject:
Physics
1

Chapter 1: Introduction to Physics

35 questions

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2

Chapter 2: Physics and Mathematics

60 questions

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3

Chapter 3: Rest and Motion: Kinematics

88 questions

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4

Chapter 4: The Forces

33 questions

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5

Chapter 5: Newton's Law of Motion

82 questions

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6

Chapter 6: Friction

57 questions

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7

Chapter 7: Circular Motion

63 questions

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8

Chapter 8: Work and Energy

101 questions

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9

Chapter 9: Centre of Mass, Linear momentum Collision

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10

Chapter 10: Rotational Mechanics

149 questions

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11

Chapter 11: Gravitation

80 questions

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12

Chapter 12: Simple Harmonic Motion

111 questions

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13

Chapter 13: Fluid Mechanics

81 questions

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14

Chapter 14: Some Mechanical Properties of Matter

87 questions

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15

Chapter 15: Wave Motion and Waves on a String

96 questions

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16

Chapter 16: Sound Waves

118 questions

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17

Chapter 17: Light Waves

79 questions

Q1
If the separation between the slits in a Young's double slit experiment is increased, what happens to the fringe-width? If the separation is increased too much, will the fringe pattern remain detectable?
Q2
Suppose white light falls on a double slit but one slit is covered by a violet filter (allowing λ = 400 nm). Describe the nature of the fringe pattern observed.
Q3
Light is _______________ .
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18

Chapter 18: Geometrical optics

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19

Chapter 19: Optical Instruments

52 questions

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20

Chapter 20: Dispersion and Spectra

27 questions

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21

Chapter 21: Speed of Light

14 questions

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22

Chapter 22: Photometry

38 questions

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Question
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Suppose white light falls on a double slit but one slit is covered by a violet filter (allowing λ = 400 nm). Describe the nature of the fringe pattern observed.

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Concepts of Physics (HC Verma Part I)

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Suppose white light falls on a double slit but one slit is covered by a violet filter (allowing λ = 400 nm). Describe the nature of the fringe pattern observed.
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The violet filter will allow only violet light to pass through it. Now, if the double slit experiment is performed with the white light and violet light, the fringe pattern will not be the same as obtained by just using white light as the source. To have interference pattern, the light waves entering from the slits should be monochromatic. So, in this case, the violet light will superimpose with only violet light (of wavelength 400 nm) in such a way that the bright bands will be of violet colour and the minima will be completely dark.
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Practice questions from Concepts of Physics (HC Verma Part I)

Question 1
Easy
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Views: 5,659

Find the range of frequency of light that is visible to an average human being
Topic

Topic:

Wave Optics

Book

Book:

Concepts of Physics (HC Verma Part I)

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Question 2
Easy
Views

Views: 5,860

The equation of a light wave is written as Here, `y` represents _______ .
  1. Displacement of ether particles
  2. Pressure in the medium
  3. Density of the medium
  4. Electric field.
Topic

Topic:

Wave Optics

Book

Book:

Concepts of Physics (HC Verma Part I)

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Question 3
Medium
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Views: 6,473

Consider the arrangement shown in the figure. The distance D is large compared to the separation d between the slits.
(a) Find the minimum value of d so that there is a dark fringe at O.
(b) Suppose d has this value. Find the distance x at which the next bright fringe is formed.
(c) Find the fringe-width.
Topic

Topic:

Wave Optics

Book

Book:

Concepts of Physics (HC Verma Part I)

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Question 4
Easy
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Views: 5,845

Two coherent sources of different intensities send waves which interfere. The ratio of maximum intensity to the minimum intensity is 25. The intensities of the sources are in the ratio ____________ .
  1. 25 : 1
  2. 5 : 1
  3. 9 : 4
  4. 625 : 1
Topic

Topic:

Wave Optics

Book

Book:

Concepts of Physics (HC Verma Part I)

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In the set up shown in Fig the two slits, and are not equidistant from the slit . The central fringe at 0 is then
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Question Text
Suppose white light falls on a double slit but one slit is covered by a violet filter (allowing λ = 400 nm). Describe the nature of the fringe pattern observed.
TopicWave Optics
SubjectPhysics
ClassClass 12
Answer TypeText solution:1
Upvotes35