Home
Class 12
PHYSICS
A double slit S1-S2 is illuminated by a ...

A double slit `S_1-S_2` is illuminated by a coherent light of wavelength `lamda`. The slits are separated by a distance d. A plane mirror is placed in front of the double slit at a distance `D_1`, from it and a screen `sum` is placed behind the double slit at a distance `D_2`, from it . The screen `sum` receives only the light reflected by the mirror. Find the fringe-width of the interference pattern on the screen.

A

`(lambda)/(d)(D_(1) + D_(2))`

B

`(2 lambda)/(d)(D_(1) + 2D_(2))`

C

`(lambda)/(d)(2D_(1) + D_(2))`

D

`(lambda)/(2d)(D_(1) + D_(2))`

Text Solution

Verified by Experts

The correct Answer is:
C
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • WAVE OPTICS

    AAKASH SERIES|Exercise Additional Practice Exercise Level - II (Lecture Sheet (Advanced) More Than One Correct Answer Type Questions|4 Videos

  • WAVE OPTICS

    AAKASH SERIES|Exercise Additional Practice Exercise Level - II (Lecture Sheet (Advanced) Linked Comprehension Type Questions)|2 Videos

  • WAVE OPTICS

    AAKASH SERIES|Exercise Additional Practice Exercise (Level - I) (Main) Straight objective type questions|16 Videos

  • WAVE MOTION AND SOUND

    AAKASH SERIES|Exercise PROBLEMS (LEVEL - II)|97 Videos

  • WAVES

    AAKASH SERIES|Exercise EXERCISE-III (Doppler effect :)|15 Videos

Similar Questions

Explore conceptually related problems

Consider the situation shown in figure. The two slits S_1 and S_2 placed symmetrically around the central line are illuminated by a monochromatic light of wavelength lamda . The separation between the slits is d. The light transmitted by the slits falls on a screen Sigma_1 placed at a distance D from the slits. The slit S_3 is at the placed central line and the slit S_4 , is at a distance z from S_3 . Another screen Sigma_2 is placed a further distance D away from 1,1. Find the ratio of the maximum to minimum intensity observed on Sigma_2 if z is equal to a. z=(lamdaD)/(2d) b. (lamdaD)/d c. (lamdaD)/(4d)

In a double-slit experiment, the slits are separated by a distance d and the screen is at a distance D from the slits. If a maximum is formed just opposite to each slit, then what is the order or the fringe so formed?

Consider the situation shown in figure. The two slite S_1 and S_2 placed symmetrically around the centre line are illuminated by a monochromatic light of wavelength lambda. The separation between the slits is d. The light transmitted by the slits falls on a screen M_1 placed at a distance D from the slits. The slit S_3 is at the centre line and the slit S_4 is at a distance y form S_3 . Another screen M_2 is placed at a further distance D away from M_1 . Find the ration of the maximum to minimum intensity observed on M_2 if y is equal to (dltltD) .

A Young's double slit apparatus has slits separated by 0.28 mm and a screen 48 cm away from the slits. The whole apparatus is immersed in water and the slits are illuminated by the red light ( lamda=700 nm in vacuum). Find the fringe-width of the pattern formed on the screen.

A narrow slit S transmitting light of wavelength lamda is placed a distance d above a large plane mirror as shown in figure. The light coming directly from the slit and that coming after the reflection interference at a screen sum placed at a distance LD from the slit. a. What will be the intensity at a point just above the mirror. i.e., just above O? b. At what distance from O does the first maximum occur? ?

A narrow slit S transmitting light of wavelength 'lambda' . Is placed at a distance d above a large plane mirror as shown. The light coming directly from the slit and that coming after the reflection interfere at a screen S placed at a distance D from the slit. at what distance from point O, the resultant intensity is maximum ? (there is a phase change of pi of reflection from the mirror)

In Young.s double slit experiment, blue-green light of wavelength 500nm is used. The slits are 1.20mm apart, and the viewing screen is 5.40 m away from the slits. What is the fringe width.

Two slits, 4 mm apart, are illuminated by light of wavelength 6000 Å . What will be the fringe width on a screen placed 2 m from the slits

A Young's double slit apparatus has slits separated by 0.25mm and a screen 48cm away from the slits. The whole apparatus is immersed in water and the slits are illuminated by the red light ( lambda=700nm in vacuum.) Find the fringe width of the pattern formed on the screen. (mu_w = 4//3)

Two slits are separated by a distance of 0.5mm and illuminated with light of lambda=6000Å . If the screen is placed 2.5m from the slits. The distance of the third bright image from the centre will be

Home
Profile