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Physics Part-II

Wave Optics

In a Youngs double-slit experiment, the slits are separated by

Physics Part-II

Class 12

NCERT

Chapter 1: Ray Optics and Optical Instruments

41 questions

Chapter 2: Wave Optics

30 questions

(a) The refractive index of glass is 1.5. What is the speed of light in glass? (Speed of light in vacuum is

3.0 \times 1 0^{8} m s^{- 1})

(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?

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.

In Youngs double-slit experiment using monochromatic light of wavelength

λ

, the intensity of light at a point on the screen where path difference is

λ

, is K units. What is the intensity of light at a point where path difference is

λ

/3?

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Solving time: 3 mins

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.

Name: Video solution 1: [Solved] 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. - Physics Part-II
Uploaded: 2023-08-15T17:26:45.000Z
Duration: 3 min
Description: Video solution 1: [Solved] 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. - Physics Part-II

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Text solutionVerified

Distance between the slits,

d = 0.28 \times 1 0^{- 3} m

Distance between the slits and the screen,

D = 1.4 m

Distance between the central fringe and the fourth

(n = 4)

fringe,

u = 1.2 \times 1 0^{- 2} m

In case of a constructive interference, we have the relation for the distance between the two fringes as:

u = nλ D / d

\Rightarrow λ = u d / n D = 6 \times 1 0^{- 7} m = 600 nm

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Practice more questions from Physics Part-II (NCERT)

(a) The refractive index of glass is 1.5. What is the speed of light in glass? (Speed of light in vacuum is

3.0 \times 1 0^{8} m s^{- 1})

(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?

In Youngs double-slit experiment using monochromatic light of wavelength

λ

, the intensity of light at a point on the screen where path difference is

λ

, is K units. What is the intensity of light at a point where path difference is

λ

/3?

View all

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Question Text	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.
Updated On	Aug 15, 2023
Topic	Wave Optics
Subject	Physics
Class	Class 12
Answer Type	Text solution:1 Video solution: 1
Upvotes	82
Avg. Video Duration	3 min

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.

Text solutionVerified

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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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