Home
Class 12
PHYSICS
Plane microwaves are incident on a long ...

Plane microwaves are incident on a long slit having a width of 5.0 cm. Calculate the wavelength of the microwaves if the first diffraction minimum is formed at `theta=30^@`.

A

2 . 5 cm

B

5 cm

C

7 . 5 cm

D

10 cm

Text Solution

Verified by Experts

The correct Answer is:
A
`a sin theta = n lambda`
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • WAVE OPTICS

    NARAYNA|Exercise Exercise - 2 (H. W) Polarisation|4 Videos

  • WAVE OPTICS

    NARAYNA|Exercise Exercise - 3|17 Videos

  • WAVE OPTICS

    NARAYNA|Exercise Exercise - 2 (H. W) Interference|12 Videos

  • SEMICONDUCTOR ELECTRONICS

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

Similar Questions

Explore conceptually related problems

What must be ratio of the slit width to the wavelength for a single slit, to have the first diffraction minimum at 45˚?

Light of frequency 25 GHz is incident normally on a rectangular slit of width 4 cm. Calculate the angular width of the central maximum of the diffraction pattern formed by the slit.

Knowledge Check

  • Plane microwaves are incident on a long slit of width 6 cm. if the first diffraction minimum is formed at 30^(@) then the wavelength of microwaves is

    A
    6 cm
    B
    4 mm
    C
    6 mm
    D
    3 cm

  • First diffraction minima due to a single slit of width 10^-4 cm is at theta=30^@ . The wavelength of the light used is –

    A
    4000A
    B
    5000A
    C
    6000A
    D
    6250A

  • 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
    `6xx10^(-3)` rad
    B
    `4xx10^(-3)` rad
    C
    `2.4xx10^(-3)` rad
    D
    `4.5xx10^(-3)` rad

    • Similar Questions

    Explore conceptually related problems

    Microwaves of frequency 24,000 MHz are incident normally on a rectengular on a rectangular slit of width 5 cm. Calculate the angular spread of the central maximum of the diffraction pattern of the slit.

    Light of wavelength 5,500 Å is illuminated on a slit. Calculate the slit width if Fresnel distance for diffraction set-up is 4 m.

    In a single slit diffraction, the width of slits is 0.5cm , focal length of lens is 40 cm and of first dark fringe is

    Light of wavelength 589.3nm is incident normally on the slit of width 0.1mm . What will be the angular width of the central diffraction maximum at a distance of 1m from the slit?

    Light of wavelength 6328Å is incident normally on slit having a width of 0.2mm The width of the central maximum measured form minimum to minimum of diffraction pattens on a screen 9.0meter away will be about-

    Home
    Profile