CBSE 12th Physics Outside Delhi Set 1 - 2023

MCQ (Single Correct Answer)

-0

Assertion (A) : In Young's double slit experiment all fringes are of equal width.

Reason (R) : The fringe width depends upon wavelength of light $$(\lambda)$$ used, distance of screen from plane of slits (D) and slits separation (d).

Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).

Both Assertion (A) and Reason (R) and true, but Reason (R) is not the correct explanation of the Assertion (A).

Assertion (A) is true, but Reason (R) is false.

Assertion (A) is false, but Reason (R) is true.

CBSE 12th Physics Delhi Set 1 - 2023

MCQ (Single Correct Answer)

-0

In a Young's double-slit experiment, the screen is moved away from the plane of the slits. What will be its effect on the following?

(i) Angular separation of the fringes.

(ii) Fringe-width.

Both (i) and (ii) remain constant.

(i) remains constant, but (ii) decreases.

(i) remains constant, but (ii) increases.

Both (i) and (ii) increase.

CBSE 12th Physics Delhi Set 1 - 2023

MCQ (Single Correct Answer)

-0

According to Huygens principle, the amplitude of secondary wavelets is

equal in both the forward and the backward directions.

maximum in the forward direction and zero in the backward direction.

large in the forward direction and small in the backward direction.

small in the forward direction and large in the backward direction.

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