English

The Fringes Produced in Diffraction Pattern Are of .

Advertisements
Advertisements

Question

The fringes produced in diffraction pattern are of _______.

(A) equal width with same intensity

(B) unequal width with varying intensity

(C) equal intensity\

(D) equal width with varying intensity

Advertisements

Solution

unequal width with varying intensity

shaalaa.com
  Is there an error in this question or solution?
2012-2013 (October)

APPEARS IN

RELATED QUESTIONS

Show that the angular width of the first diffraction fringe is half that of the central fringe.


In Young's double slit experiment, describe briefly how bright and dark fringes are obtained on the screen kept in front of a double slit. Hence obtain the expression for the fringe width.


In a double-slit experiment the angular width of a fringe is found to be 0.2° on a screen placed 1 m away. The wavelength of light used is 600 nm. What will be the angular width of the fringe if the entire experimental apparatus is immersed in water? Take refractive index of water to be 4/3.


Using analytical method for interference bands, obtain an expression for path difference between two light waves.


In Young’s double slit experiment, show graphically how the intensity of light varies with distance


In Young’s experiment interference bands were produced on a screen placed at 150 cm from two slits, 0.15 mm apart and illuminated by the light of wavelength 6500 Å. Calculate the fringe width.


Two coherent sources of light having intensity ratio 81 : 1 produce interference fringes. Calculate the ratio of intensities at the maxima and minima in the interference pattern.


The slits in a Young's double slit experiment have equal width and the source is placed symmetrically with respect to the slits. The intensity at the central fringe is I0. If one of the slits is closed, the intensity at this point will be ____________ .


A thin transparent sheet is placed in front of a Young's double slit. The fringe-width will _____________ .


If the source of light used in a Young's double slit experiment is changed from red to violet, ___________ .


In a Young's double slit experiment, using monochromatic light, the fringe pattern shifts by a certain distance on the screen when a mica sheet of refractive index 1.6 and thickness 1.964 micron (1 micron = 10−6 m) is introduced in the path of one of the interfering waves. The mica sheet is then removed and the distance between the screen and the slits is doubled. It is found that the distance between the successive maxima now is the same as the observed fringe-shift upon the introduction of the mica sheet. Calculate the wavelength of the monochromatic light used in the experiment.


Consider the arrangement shown in the figure. The distance D is large compared to the separation d between the slits. 

  1. Find the minimum value of d so that there is a dark fringe at O.
  2. Suppose d has this value. Find the distance x at which the next bright fringe is formed. 
  3. Find the fringe-width.

In a Young's double slit interference experiment, the fringe pattern is observed on a screen placed at a distance D from the slits. The slits are separated by a distance d and are illuminated by monochromatic light of wavelength \[\lambda.\] Find the distance from the central point where the intensity falls to (a) half the maximum, (b) one-fourth the maximum.


What should be the path difference between two waves reaching a point for obtaining constructive interference in Young’s Double Slit experiment ?


In Young's double slit experiment using monochromatic light of wavelength 600 nm, 5th bright fringe is at a distance of 0·48 mm from the centre of the pattern. If the screen is at a distance of 80 cm from the plane of the two slits, calculate:
(i) Distance between the two slits.
(ii) Fringe width, i.e. fringe separation.


In Young’s double-slit experiment, show that: 

`beta = (lambda "D")/"d"` where the terms have their usual meaning.


Write the conditions on path difference under which constructive interference occurs in Young’s double-slit experiment.


When a beam of light is used to determine the position of an object, the maximum accuracy is achieved, if the light is ______.


In Young’s double slit experiment, what should be the phase difference between the two overlapping waves to obtain 5th dark band/fringe on the screen?


In Young's double slit experiment the slits are 0.589 mm apart and the interference is observed on a screen placed at a distance of 100 cm from the slits. It is found that the 9th bright fringe is at a distance of 7.5 mm from the dark fringe which is second from the center of the fringe pattern. Find the wavelength of the light used.


An unpolarised beam of intensity 2a2 passes through a thin polaroid. Assuming zero absorption in the polaroid, the intensity of emergent plane polarised light will be


Two balls are projected at an angle θ and (90° − θ) to the horizontal with the same speed. The ratio of their maximum vertical heights is:


Why is the diffraction of sound waves more evident in daily experience than that of light wave?


If the monochromatic source in Young’s double slit experiment is replaced by white light, then ______.


What is fringe width?


What is the interference pattern observed on the screen in Young's double-slit experiment?


What does \(d\) denote in Young's double-slit experiment?


What path difference produces a bright fringe?


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×