Question

Which phenomenon provides evidence that light
has a wave nature?
(1) emission of light from an energy-level
transition in a hydrogen atom
(2) diffraction of light passing through a narrow
opening
(3) absorption of light by a black sheet of paper
(4) reflection of light from a mirror

Answer 1

Answer:

(2) diffraction of light passing through a narrow  opening

Explanation:

As we know that when light passes through a small opening then the wavefront that passes  through small opening will behave like a combination of large number of point sources.

Each point source will emit a wave and due to superposition of all such waves we can observe a pattern of maximum and minimum on the screen.

this is given by the equation

$a sin\theta = N\lambda$

so here we can say that the correct answer will be

(2) diffraction of light passing through a narrow  opening