A white light is normally incident on a soap bubble of thickness 0.40 um and refractive index 1.4 , which wavelengtts may cause bright fringes?
Answers
Answered by
1
Explanation:
n1 = n2 < n3
A phase change of π takes place at point A, but not at B. Hence for a constructive interference to be obtained, the condition is-
2μd cos r = ( m - 1/2 )λ
λ = 2μd / ( m - 1/2 )
λ lies in visible region only for m = 8
λ (m=8) = 5320A°
Hope this helps.
MARK AS BRAINLIEST.
Similar questions