Home
Class 12
PHYSICS
A lens of focal length f gives diffracti...

A lens of focal length f gives diffraction pattern of F raunhoffer type of a slit having width a. If wavelength of light is `lambda`, the distance of first dark band and next bright band from axis is given by

A

`(a)/(lambda)f`

B

`(lambda)/(a)f`

C

`(lambda)/(a f)`

D

`a lambda f`

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • WAVE OPTICS

    NARAYNA|Exercise LEVEL - I (C.W)|38 Videos

  • WAVE OPTICS

    NARAYNA|Exercise LEVEL - II (C.W)|31 Videos

  • SEMICONDUCTOR ELECTRONICS

    NARAYNA|Exercise ADDITIONAL EXERCISE (ASSERTION AND REASON TYPE QUESTIONS :)|19 Videos

Similar Questions

Explore conceptually related problems

A diffraction pattern is produced by a single slit of width 0.5mm with the help of a convex lens of focal length 40cm. If the wavelength of light used is 5896Å. then the distance of first dark fringe from the axis will be-

The first minimum of a single slit diffraction pattern is observed at angle 2^(@) with a light of wavelength 698 nm. The width of this slit is

In the diffraction pattern due to a single slit of width 'd' with incident light of wavelength 'lamda', at an angle of diffraction 'theta', the condition for first minimum is

In a biprism experiment, the distance between the two virtual images of the slit is 1.2 mm and the wavelenght of light used is 4000Å . If the distance of third bright band from central bright band is 1 mm, and the distance is and the distance between the brprism and focal palne of the eyepiece is 0.9 , then distannce between slit and biprism will be

In a single slit diffraction, the width of slit is 0.5 cm , focal lengths of lens is 40 cm and wavelength of light is 40 cm and wavelength of light is 4890Å . Distance of rist dark fringe is

In a fraunhofer's diffraction by a slit, if slit width is a, wave length lamda focal length of lens is f, linear width of central maxima is-

A linear aperture whose width is 0.02cm is placed immediately in front of a lens of focal length 60cm . The aperture is illuminated normally by a parallel beam of wavelength 5xx10^-5cm . The distance of the first dark band of the diffraction pattern from the centre of the screen is

In a biprism experiment , the two virtual sources are 0.4 mm apart and the eyepiece is 1.25 mm away from the slit . If the wavelength of light used in 8000 Å , calculate the distance of (i) 8th bright band and (ii) 11th dark band from the central bright band