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Young's Double Hole Experiment

In a YDSE exp...

Question

In a YDSE experiment if a slab whose refractive index can be varied is placed in front of one of the slits then the variation of resultant intensity at mid-point of screen with $^{'} μ^{'}$ will be best represented by $μ \geq 1$ . [Assume slits of equal width and there is no absorption by slab]

A

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B

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C

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D

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Solution

The correct option is B

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Y D S E

, if a slab whose refractive index can be varied is placed in front of the upper slit. Then, the variation of resultant intensity

I

, at mid-point of screen with

μ

will be best represented by

(μ \geq 1

I_{0}

is the maximum intensity)

Q. A transparent slab of thickness t and refractive index

μ

is inserted in front of upper slit of YDSE apparatus. The wavelength of light used is

λ

. Assume that there is no absorption of light by the slab. Select the correct statement (s) :

Q. In a YDSE setup light of wavelength

4000 \circ A

is used. Distance of screen from the slits is

2 m

and distance between slits is

1 m m

. There are three slabs slab

1

2 m m, μ = 2), s l a b 2

1 m m, μ = 3)

3

4 m m, μ = \frac{3}{2})

(A) If slab $1$ is placed in front of slit $S_{1}$	(P) Central maxima at $C$
(B) If the slab $2$ is placed in front of slit $S_{2}$ along with condition (A)	(Q) Central maxima above $C$
(C) If slab $3$ is placed in front of slab $1$ along with condition (B)	(R) Fringe width is equal to $0.8 m m$
	(S) No. of fringes crossing central maxima as a result of slab placing is $5000$

Q. If a transparent slab of refractive index

μ

=1.5 and thickness t=

2.5 \times 10^{- 5}

is inserted in front of one of the slits of Young's double slit experiment, how much will be the shift in the interference pattern? The distance between the slits is 0.5 mm and that between slits and screen is 100 cm.

Y D S E

, both slits produce equal intensities on the screen. A

100 %

transparent thin film is placed in front of one of the slits. Now, the intensity on the centre becomes

75 %

of the previous intensity. The wavelength of the light is

6000 A^{o}

and refractive index of glass is

1.5

The minimum thickness of the glass slab is:

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