SATHEE: Optics Question 900

Optics Question 900

Question: In Young’s double-slit experiment, let A and B be the two slits. A thin film of thickness t and refractive index [i is placed in front of A. Let $β = f r i n g s$ width. Then the central maxima will shift

Options:

A) toward A

B) toward B

C) by $t (μ - 1) \frac{β}{λ}$

D) by $μ t \frac{β}{λ}$

Show Answer

Answer:

Correct Answer: A

Solution:

[a] For central maximum at P, $\frac{x d}{D} = t (μ - 1)$ or $x = t (μ - 1) \frac{D}{d}$ .

Now, $β = \frac{D λ}{d}$

$∴ \frac{D}{d} = \frac{β}{λ}$ .

Hence, $x = t (μ - 1) \frac{β}{λ}$

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Optics Question 900

Question: In Young’s double-slit experiment, let A and B be the two slits. A thin film of thickness t and refractive index [i is placed in front of A. Let β=frings width. Then the central maxima will shift

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Answer:

Solution:

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Question: In Young’s double-slit experiment, let A and B be the two slits. A thin film of thickness t and refractive index [i is placed in front of A. Let $β = f r i n g s$ width. Then the central maxima will shift