Wave OpticsHard
Question
If the ratio of the intensity of two coherent sources is 4 the visibility [(Imax - Imin) / (Imax + Imin)] of the fringes is
Options
A.4
B.4 / 5
C.3 / 5
D.9
Solution
Given 
= 4 ∴ I1 = 4I (let the I2 - I)
Imax = (√ I1 + √I2)2 = (2√ I + √I)2 = 9I
Imin = (√ I1 - √I2)2 = (2√ I - √I)2 = I
∴
= 4 ∴ I1 = 4I (let the I2 - I)Imax = (√ I1 + √I2)2 = (2√ I + √I)2 = 9I
Imin = (√ I1 - √I2)2 = (2√ I - √I)2 = I
∴
Create a free account to view solution
View Solution FreeMore Wave Optics Questions
Diffraction of light is observed only, when the obstacle size is :...The intensity of the central fringe obtained in the interference pattern due to two indentical slit sources is I. When o...In diffraction radius of half period zone is proportional to :...In Young′s double slit experiment :...When exposed to sunlight, thin films of oil on water often exhibit brilliant colours due to the phenomenon of :...