Home
Class 12
PHYSICS
A beam of light consisting of two wavele...

A beam of light consisting of two wavelengths 6500Å and 5200Å is used to obtain interference fringes in YDSE. The distance between slits is 2mm and the distance of the screen form slits is 120 cm. What is the least distance from central maximum where the bright due to both wavelengths coincide?

A

0.156cm

B

0.312cm

C

0.078cm

D

0.468cm

Text Solution

Verified by Experts

The correct Answer is:
A
`(n_1lambda_1D)/d = (n_2lambda_2D)/d`
or `n_1/n_2 = lambda_1/lambda_2 = 5200/6500= 4/5 `
` :.` 4th maxima of `lambda_1` coincides with 5th maxima
of `lambda_2`.
` y_min = (4lambda_1 D)/d `
` = (4 xx 6500 xx 10^-10 xx 1.2)/(2 xx (10^(-3)))`
` = 1.56 xx 10^(-3)m = 0.156 cm ` .
Promotional Banner

Topper's Solved these Questions

  • INTERFERENCE AND DIFFRACTION OF LIGHT

    DC PANDEY|Exercise Level 1Subjective|22 Videos

  • INTERFERENCE AND DIFFRACTION OF LIGHT

    DC PANDEY|Exercise Subjective Questions|5 Videos

  • INTERFERENCE AND DIFFRACTION OF LIGHT

    DC PANDEY|Exercise Level 1 Objective|11 Videos

  • GRAVITATION

    DC PANDEY|Exercise All Questions|120 Videos

  • MAGNETIC FIELD AND FORCES

    DC PANDEY|Exercise Medical entrance s gallery|59 Videos

Similar Questions

Explore conceptually related problems

A beam of light consisting of two wavelengths 6500Å and 5200Å is used to obtain interference fringes in a young's double slit experiment the distanece between the slits is 2mm and the distance between the plane of the slits and screen is 120 cm. (a). Find the distance of the third bright fringe on the screen from the central maxima for the wavelength 6500Å (b). What is the least distance from the central maxima where the bright fringes due to both the wave lengths coincide?

A beam of light consisting of two wavelength 6500Å&5200Å is used to obtain interferance fringes in a young's double slit experiment .The distance between the slits is 2.0mm and the distance between the plane of the slits and thescreen is 120cm ,.what is the least distance from the central maximum where the bright fringes due to both the wave length coincides?

A beam of light consisting of two wavelength 800 nm and 600 nm is used to obtain the interference fringes in YDSE on a screen held 1.4 m away. If the two slits are separated by 0.28 mm , calculate the least distance from thecentral bright maximum, where the bright fringes of the two waveength coincide.

A beam of light consisting of two wavelengths, 650 nm and 520 nm is used to obtain interference fringes in Young's double-slit experiment. What is the least distance (in m) from a central maximum where the bright fringes due to both the wavelengths coincide ? The distance between the slits is 3 mm and the distance between the plane of the slits and the screen is 150 cm.

A beam of light consisting of two wavelength, 6500 Å and 5200 Å is used to obtain interference fringes in a Young's double slit experiment. Find the distance of the third fringe on the screen from the central maximum for the wavelength 6500Å . What is the least distance from the central maximum at whixh the bright fringes due to both wavelengths coincide? The distance between the slits is 2 mm and the distance between the plane of the slits and the screen is 120 cm.

A beam of light contains two wavelengths 6500Å and 5200Å They form interference fringes in Young's double slit experiment. What is the least distance (approx) from central maximum. Where the bright fringes due to both wavelength coincide? The distance between the slits is 2 mm and the distance of screen is 120 cm.