Question

Assertion : Thin films such a soap bubble or a thin layer of oil on water show beautiful colours when illuminated by white light.

Reason : Light reflected from the upper surface of the thin film due to the interference.

(a) Both A and R are true and R is the correct explanation of A

(b) Both A and R are true but R is not correct explanation of A

(c) A is true but R is false

(d) A and R are false

Answer 1

The correct option is (c).

Explanation:

The beautiful colours are seen on account of interference of light reflected from the upper and the lower surfaces of the thin film. As conditions for constructive and destructive interference depend upon the wavelength of light, **** interference fringes are observed.