Home
Class 12
PHYSICS
In a Young's double slit experiment, a p...

In a Young's double slit experiment, a parallel beam containing wavelengths `lambda_(1)=4000Å` and `lambda_(2)=5600Å` is incident at an angle `phi=30^(@)` on a diaphragm having narrow slits at separation d=2mm. The screen is placed at a distance D =40 cm from the slits. a mica slab of thickness t=5mm is placed in front of one of the slits and whole of the apparatus is submerged in water. if the central bright fringe is observed at C, determine.

(i) The refractive index of the slab
(ii) The distance of first black line from C
both wavelength are in air. take `mu_(w)=4/3`

Text Solution

Verified by Experts

(i)`mu=1.6`
(ii)`210 mu m `
Promotional Banner

Topper's Solved these Questions

  • WAVE OPTICS

    AAKASH INSTITUTE ENGLISH|Exercise Assignment (Section-J (Aakash Challengers question))|1 Videos

  • WAVE OPTICS

    AAKASH INSTITUTE ENGLISH|Exercise Assignment (Section-H (Multiple True-False type question))|1 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

In a double slit experiment, the distance between the slits is d. The screen is at a distance D from the slits. If a bright fringe is formed opposite to one of the slits, its order is

Lights of wavelengths lambda_(1)=4500 Å, lambda_(2)=6000 Å are sent through a double slit arrangement simultaneously. Then

In Young's double slit experiment slits are separated by 2 mm and the screen is placed at a distance of1.2 m from the slits. Light consisting of two wavelengths 6500Å and 5200Å are used to obtain interference fringes. The the separation between the fourth bright fringes the two wavelength is

Two slits are separated by a distance of 0.5mm and illuminated with light of lambda=6000Å . If the screen is placed 2.5m from the slits. The distance of the third bright image from the centre will be

In the Young's double slit experiment, the spacing between two slits is 0.1mm . If the screen is kept at a distance of 1.0m from the slits and the wavelength of ligth is 5000Å , then the fringe width is

In Young's double-slit experiment, the slits are 2mm apart and are illuminated by photons of two wavelengths lambda_1=12000Å and lambda_2=10000Å . At what minimum distance from the common central bright fringe on the screen 2m from the slit will a bright fringe from one interference pattern coincide with a bright fringe from the other?

Light of wavelength lambda=5000Å falls normally on a narrow slit. A screen is placed at a distance of 1m from the slit and perpendicular to the direction of light. The first minima of the diffraction pattern is situated at 5mm from the centre of central maximum. The width of the slit is

White light is used to illuminate the two slits in a Young's double slit experiment. The separation between the slits is b and theh screen is at a distance d (gt gtb) from the slits At a point on the screen directly in front of one of the slits, certain wavelengths are missing some of these missing wavelengths are

White light is used to illuminate the two slits in a Young's double slit experiment. The separation between the slits is b and the screen is at a distance d (gt gtb) from the slits At a point on the screen directly in front of one of the slits, certain wavelengths are missing some of these missing wavelengths are

In Young's double slit experiment the 7th maximum with wavelength lambda_(1) is at a distance d_(1) , and that with wavelength lambda_(2) is at distance d_(2) . Then d_(1)//d_(2) is