Question

In Young's double slit experiment the two slits act as coherent source of equal amplitude A and wavelength l. In another experiment with the same set up the two slits are source of equal amplitude A and wave length l, but are incoherent. The ratio of the intensity of light at the midpoint of the screen –

• A. 1
• B. 2
• C. 3
• D. 4

Answer 1

Answer: (B)

2

Answer 2

In 1^st experiment I µ 4A²

In 2^nd experiment I µ 2A²