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:
Answer & explanation
Correct answer: option 4
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)