Question

A light has amplitude A and angle between analyser and polariser is 60°. Light is reflected by analyser has amplitude(a) A √2(b) A / √2(c) √3 A / 2(d) A / 2

Answer 1

answer : option (d) A/2

explanation : A light has amplitude A and angle between analyser and polariser is 60° .

light is reflected by analyser has amplitude = ?

we know, amplitude of light reflected by analyser , A' = $Acos\theta$

where, A is amplitude of light and $\theta$ is angle between analyser and polariser

so, A' = Acos60° = A/2

hence, option (D) A/2 is correct.

Answer 2

Answer:

light is reflected by analyser having amplitude equals

A/2