Home
Class 12
PHYSICS
A parallel beam of monochromatic light o...

A parallel beam of monochromatic light of wavelength 450 nm passes through a long slit of width 0.2 mm. find the angular divergence in which most of the light is diffracted.

Text Solution

Verified by Experts

Most of the light is diffracted between the two first order minima
Which occurs between `theta=pm(lambda)/b`
Here `lambda=450nm`
b=0.2 mm
`rArr theta ~=pm2.25xx10^(-3)` radian
Hence angular divergence =`2theta=4.5xx10^(-3)` radian
Promotional Banner

Topper's Solved these Questions

  • WAVE OPTICS

    AAKASH INSTITUTE ENGLISH|Exercise Try yourself|24 Videos

  • WAVE OPTICS

    AAKASH INSTITUTE ENGLISH|Exercise Assignment (Section-A (objective type question(one option is correct)))|55 Videos

  • UNITS AND MEASUREMENTS

    AAKASH INSTITUTE ENGLISH|Exercise ASSIGNMENT (SECTION - D)|15 Videos

  • WAVES

    AAKASH INSTITUTE ENGLISH|Exercise ASSIGNMENT ( SECTION-D ( Assertion - Reason Type Questions ))|12 Videos

Similar Questions

Explore conceptually related problems

A parallel beam of light of wavelength 6000Å gets diffracted by a single slit of width 0.3 mm. The angular position of the first minima of diffracted light is :

A parallel beam of light of wavelength 4000 Å passes through a slit of width 5 xx 10^(-3) m . The angular spread of the central maxima in the diffraction pattern is

A parallel beam of green light of wavelength 546 nm passes through a slit of width 0.40mm. The transmitted light is collected on a screen 40 cm away. Find the distance between the two first order minima.

A parallel beam of monochromatic light of wavelength 500 nm is incident normally on a rectangular slit. The angular width of the central fringe of Fraunhofer diffraction is found to be 60^(@) . Find the width of the slit in metre.

For a parallel beam of monochromatic light of wavelength 'lambda' diffraction is produced by a single slit whose width 'a' is of the order of the wavelength of the light. If 'D' is the distance of the screen from the slit, the width of the central maxima will be

Monochromatic light of wavelength 580 nm is incident on a slit of width 0.30 mm. The screen is 2m from the slit . The width of the central maximum is

For a parallel beam of monochromatic. Light of wavelength 'lamda' diffraction is produced by a single slit whose width 'a' is of the order of the wavelength of the lightl. If 'D' is the distance of the screen from the slit, the width of the central maxima will be

Light of wavelength 600 nm is incident normally on a slit of width 0.2 mm. The angular width of central maxima in the diffraction pattern is

A parallel beam of monochromatic light of wavelength 5000Å is incident normally on a single narrow slit of width 0.001mm . The light is focused by a convex lens on a screen placed on the focal plane. The first minimum will be formed for the angle of diffraction equal to

A parallel beam of monochromatic light of wavelength 5000Å is incident normally on a single narrow slit of width 0.001mm . The light is focused by a convex lens on a screen placed on the focal plane. The first minimum will be formed for the angle of diffraction equal to