Question

Light of wavelength 600 nm falls on glass plate at angle of incidence calculate smallest thickness

Answer 1

Answer:

Given:

λ=5.88×10−7m

μ=1.5

r=600

To find :

t

Solution :

For Destructive interference on a reflected side of thin film:-

2μcosr=nλ

(For minimum thickness, n=1)

2(1.5)tcos(60)=5.88×10−7

t=3.92×10−7

t=0.392μm

hope this might help you