Question

Four light waves are represented by

(i) y = a₁sin ωt.

(ii) y = a₂sin(ωt. + ∈)

(iii) y = a₁sin 2ωt.

(iv) y = a₂sin 2(ωt + ∈).

Interference fringes may be observed due to superposition of

(a) (i) and (ii)

(b) (i) and (iii)

(c) (ii) and (iv)

(d) (iii) and (iv).

Answer 1

(a) (i) and (ii)

(d) (iii) and (iv).