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Does focal length of a lens depend on the colour of the light
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

119 questions

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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

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18

Chapter 18: Geometrical optics

123 questions

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19

Chapter 19: Optical Instruments

52 questions

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20

Chapter 20: Dispersion and Spectra

27 questions

Q1
Monochromatic light should be used to produce pure spectrum. Comment on this statement.
Q2
Does focal length of a lens depend on the colour of the light used? Does focal length of a mirror depend on the colour?
Q3
Suggest a method to produce a rainbow in your house.
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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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Does focal length of a lens depend on the colour of the light used? Does focal length of a mirror depend on the colour?

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Concepts of Physics (HC Verma Part I)

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Text SolutionText solutionverified iconVerified

Yes, the focal length of a lens depends on the colour of light.According to lens-maker's formula,Here, f is the focal length, μ is the refractive index, R is the radius of curvature of lens.The refractive index (μ) depends on the inverse of square of wavelength.The focal length of a mirror is independent of the colour of light.
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Question 1
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Book:

Concepts of Physics (HC Verma Part I)

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Concepts of Physics (HC Verma Part I)

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Concepts of Physics (HC Verma Part I)

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Question Text
Does focal length of a lens depend on the colour of the light used? Does focal length of a mirror depend on the colour?
TopicRay Optics and Optical Instruments
SubjectPhysics
ClassClass 12
Answer TypeText solution:1
Upvotes74