Home
Class 11
PHYSICS
A single slit of width 0.1mm is illumina...

A single slit of width 0.1mm is illuminated by parallel light of wavelength 6000Å, and diffraction bands are observed on a screen 40cm from the slit. The distance of third dark band from the central bright band is:

A

7.2 mm

B

3.6 mm

C

2.4 mm

D

0.6 mm

Text Solution

Verified by Experts

The correct Answer is:
A
Width `=(3xx6xx10^(-7)xx0.4)/(10^(-4)) =7.2 mm`
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • UNITS, DIMENSION & MEASUREMENT

    RESONANCE|Exercise Exercise|27 Videos

  • WORK POWER AND ENERGY

    RESONANCE|Exercise Exercise|37 Videos

Similar Questions

Explore conceptually related problems

A single slit of width 0.1 mm is illuminated by a parallel beam of light of wavelength 6000Å and diffraction bands are observed on a screen 0.5 m from the slit. The distance of the third dark band from the central bright band is _______ mm.

Light of wavelength 6000Å is incident on a slit of width 0.30 mm. The screen is placed 2 m from the slit. Find (a) the position of the first dark fringe and (b). The width of the central bright fringe.

Knowledge Check

  • A single slit of width 0.1 mm is illuminated by a parallel beam of light of wavelength 6000 Å and diffraction bands are observed on a screen 0.5 m from the slit. The distance of the third dark band from the central bright band is:

    A
    3 mm
    B
    9 mm
    C
    4.5 mm
    D
    1.5 mm

  • A single slit of width 0.20 mm is illuminated with light of wavelength 500 nm . The observing screen is placed 80 cm from the slit. The width of the central bright fringe will be

    A
    `1 mm`
    B
    `2 mm`
    C
    `4 mm`
    D
    `5 mm`

  • A single slit of width 0.20mm is illuminated with light of wavelength 500nm . The observing screen is placed 80cm from the slit. The width of the central bright fringe will be

    A
    (a) `1mm`
    B
    (b) `2mm`
    C
    (c) `4mm`
    D
    (d) `5mm`

    • Similar Questions

    Explore conceptually related problems

    A parallel beam of light of wavelength lambda is incident normally on a single slit of width d. Diffraction bands are obtained on a screen placed at a distance D from the slit. The second dark band from the central bright band will be at a distance gives by :

    A single slit of width 0.20 mm is illuminated with light of wavelength 500 nm. The observing screen is placed 80 cm from the slit. The width of the central bright fringe will be :

    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

    Two sources of light 0.85 mm apart are illuminated by a light of wavelenths, 6000Å . The phase difference between the two waves intefering on screen,.1.7 m away from the slite at a point 2.5 mm from the central bright band is nearly.

    Two parallel slits 1 mm apart are illuminated with light of wavelength 5000 Å, from a single slit. Interference pattern is obtained on a screen placed at 1 m from the slits, what is the distance between the first bright bannd and the seventh dark band?

    Home
    Profile