Question

The thickness of a quarter wave plate made of quartz for wavelength λ = 6000 Å , refractive indices μ_e = 1.553  and μ₀ = 1.543 is: 

(a)  1.25 x 10^-3 cm

(b)  0.15 x 10^-3 cm

(c)  1.50  x 10^-3 cm

(d)  2.50  x 10^-3 cm

Answer 1

Correct option  (c) 1.50 x 10^-3 cm

Explanation:

The plate which produce a path difference of (λ/4) for extraordinary and ordinary rays is called quarter wave plate