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12th CBSE
IMPORTANT
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In a Young's double slit interference pattern at a point, we observe the 10th bright fringe (order maxima) for wavelength 7000Å. What order maxima will be visible if the source of light is replaced by light of wavelength 5000Å? In a Young's double slit interference pattern at a point, we observe the 10th bright fringe (order maxima) for wavelength 7000Å. What order maxima will be visible if the source of light is replaced by light of wavelength 5000Å?

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Important Questions on Wave Optics

MEDIUM
12th CBSE
IMPORTANT
PHYSICS A Reference Book for Class 12 Volume 2>Chapter 2 - Wave Optics>Problems For Practice>Q 19
The fringe width in a Young's double slit the interference pattern is 2.4×10-4 m when red light of wavelength 6400 Å is used. By how much will it change in mm if blue light of wavelength 4000 Å is used.
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12th CBSE
IMPORTANT
PHYSICS A Reference Book for Class 12 Volume 2>Chapter 2 - Wave Optics>Problems For Practice>Q 20
In a Young's double slit experiment, the two slits are 2 mm apart and the screen is positioned 140 cm away from the plane of the slits. The slits are illuminated with light of wavelength 600 nm. Find the distance of the third bright fringe, from the central maximum, in the interference pattern obtained on the screen. If the wavelength of the incident light were changed to 480 nm, find the shift in the position of third bright fringe from the central maximum.
HARD
12th CBSE
IMPORTANT
PHYSICS A Reference Book for Class 12 Volume 2>Chapter 2 - Wave Optics>Problems For Practice>Q 21
In Young's double slit experiment, two slits are separated by 3 mm distance and illuminated by light of wavelength 480 nm. The screen is 2 m from the plane of slits. Calculate the separation between the 8th bright fringe and the 3rd dark fringe observed with respect to the central bright fringe.
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12th CBSE
IMPORTANT
PHYSICS A Reference Book for Class 12 Volume 2>Chapter 2 - Wave Optics>Problems For Practice>Q 1
Two coherent sources, whose intensity ratio is 16:1 produce interference fringes. If the ratio of intensity of maxima and minima in the fringe system is 253α. Find value of  α.
MEDIUM
12th CBSE
IMPORTANT
PHYSICS A Reference Book for Class 12 Volume 2>Chapter 2 - Wave Optics>Problems For Practice>Q 2
The two slits in Young's experiment have widths in a ratio 25:1. The ratio of light intensity at the maxima and minima in the interference pattern is 9:x. Find x.
MEDIUM
12th CBSE
IMPORTANT
PHYSICS A Reference Book for Class 12 Volume 2>Chapter 2 - Wave Optics>Problems For Practice>Q 3
Light waves from two coherent sources have intensities in the ratio of 4:9. Find the ratio of intensities of maxima and minima in the interference pattern.
MEDIUM
12th CBSE
IMPORTANT
PHYSICS A Reference Book for Class 12 Volume 2>Chapter 2 - Wave Optics>Problems For Practice>Q 4
The ratio of intensity at maxima and minima is 25:16. The ratio of the width of the two slits in Young's double slit experiment will be _____ : 1.
MEDIUM
12th CBSE
IMPORTANT
PHYSICS A Reference Book for Class 12 Volume 2>Chapter 2 - Wave Optics>Problems For Practice>Q 5
Two coherent sources whose intensity ratio is 81:1 produce interference fringes. The ratio of intensity of maxima and minima in the fringe system is _____ : 16.