Question

A plate of refractive index 1.5 is placed in the passage of one ray in Young’s experiment. If the central fringe is bright, the minimum thickness of the plate is ..........,choose the correct option from the given options.
(A) 2 λ
(B) λ
(C) λ/3
(D) 2λ/3

Answer 1

In an ideal young slit experiment, the thickness can be measured and introduced in path of one interfering beams.

This actually determines the portion and central minimum thickness has right value and 2λ/3 can be measured.

It is made of refractive index placed in front of one of the slights in a double slit.

Answer 2

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☸ Required Answer is ⬇ ⬇⬇ ⬇


⭕ (D) 2λ/3


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