Question

Yellow light of intensity I0 is used in a single slit diffraction experiment with slit width of 0.6 mm if yellow light is replaced by Red light of same intensity I0 , then the observed pattern will reveal,

(a) that the central maximum is broader

(b) Intensity of central maxima reduces

(c) Intensity of central maxima remain same

(d) First minima appears at higher angle

Answer 1

Correct option (a), (c) and (d)

Explanation:

Since λ (Red-light) is more than yellow light. Thus the fist minima appears at higher angle as a result the width of the central maxima increases. But intensity of central maxima remain same as incident intensity is unchanged.