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The interference pattern shifts downward by $4 mm$ when a polystyrene sheet of refractive index $1.8$ is placed in front of the lower slit. If wavelength used is $λ = 683 nm$ , the separation between slits is $2 mm$ and separation between slits and screen is $10 cm$ , then thickness of sheet is,

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Important Questions on Wave Optics

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Beta Question Bank for Medical: Physics>Chapter 31 - Wave Optics>Exercise (Previous Year Questions)>Q 18

The reflected ray is completely polarized when a ray is incident at a medium of refractive index 1.73, then the value of angle of refraction ?

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Beta Question Bank for Medical: Physics>Chapter 31 - Wave Optics>Exercise (Previous Year Questions)>Q 19

If the intensity of central fringe in interference pattern is

0.01 W m^{- 2}

, then find intensity at a point having path difference

\frac{λ}{3}

on a screen from the centre (in

W m^{- 2}

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Beta Question Bank for Medical: Physics>Chapter 31 - Wave Optics>Exercise (Previous Year Questions)>Q 20

In a diffraction pattern due to a single slit of width

a

the first minimum is observed at an angle

30^{o}

when light of wavelength

5000 Å

is incident on the slit. The first secondary maximum is observed at an angle of:

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Beta Question Bank for Medical: Physics>Chapter 31 - Wave Optics>Exercise (Previous Year Questions)>Q 21

The intensity at the maximum in a Young’s double- slit experiment is

I_{0}

. Distance between two slits is

d = 5 λ

, where

λ

is the wavelength of light used in the experiment. What will be the intensity in front of one of the slits on the screen placed at a distance

D = 10 d

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Beta Question Bank for Medical: Physics>Chapter 31 - Wave Optics>Exercise (Previous Year Questions)>Q 22

The interference pattern is obtained with two coherent light sources of intensity ratio $n$ . In the interference pattern, the ratio $\frac{I_{\max }-I_{\min }}{I_{\max }+I_{\min }}$ will be

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Beta Question Bank for Medical: Physics>Chapter 31 - Wave Optics>Exercise (Previous Year Questions)>Q 23

A linear aperture whose width is 0.02 cm is placed immediately in front of a lens of focal length 60 cm. The aperture is illuminated normally by a parallel beam of wavelength 5 x I0⁵cm. The distance of the' central of the screen is

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Beta Question Bank for Medical: Physics>Chapter 31 - Wave Optics>Exercise (Previous Year Questions)>Q 24

In YDSE, the distance between slits and screen is

1.5 m

. When light of wavelength

500 nm

is used, then

2^{nd}

bright fringe is obtained on the screen at a distance of

10 mm

from central bright fringe. What will be the shift in position of

2^{nd}

bright fringe if light of wavelength

550 nm

is used?

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Beta Question Bank for Medical: Physics>Chapter 31 - Wave Optics>Exercise (Previous Year Questions)>Q 25

A polaroid making an angle 60° with electric vector then intensity reduced by a factor of :-

The interference pattern shifts downward by 4 mm when a polystyrene sheet of refractive index 1.8 is placed in front of the lower slit. If wavelength used is λ=683 nm, the separation between slits is 2 mm and separation between slits and screen is 10 cm, then thickness of sheet is,

Important Questions on Wave Optics

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The interference pattern shifts downward by $4 mm$ when a polystyrene sheet of refractive index $1.8$ is placed in front of the lower slit. If wavelength used is $λ = 683 nm$ , the separation between slits is $2 mm$ and separation between slits and screen is $10 cm$ , then thickness of sheet is,