Conditions for obtaining a interference pattern of light are

(A) Two waves should be coherent
(B) The distance of the screen from the slits should be small
(C) The separation between slits should be small
(D) Two coherent waves should have nearly the same amplitude

Choose the correct answer from the options given below:

(A), (C) and (D) only

The correct answer is Option (4) → (A), (C) and (D) only

Conditions for interference of light:

(A) Two waves should be coherent ✔

(B) The distance of the screen from the slits should be small ✘ (it should be large to observe clear fringes)

(C) The separation between slits should be small ✔

(D) Two coherent waves should have nearly the same amplitude ✔

∴ Correct options: (A), (C), (D)