Electromagnetic WavesMedium
Question
An electromagnetic wave of wavelength λo (in vacuum) passes from P towards Q crossing three different media of refractive index μ, 2μ and 3μ respectively as shown in figure. φP and φQ be the phase of the wave at points P and Q. Find the phase difference φQ - φP. [Take : μ = 1]
Options
A.0
B.
C.
D.π
Solution
Optical path difference between (OPD) P & Q
(O.P.D.) = 2.25λo × 1 +(3.5λo) × 2 + 3λo × 3
= 18.25 λo and ᐃφ =
× ᐃx = 
(O.P.D.) = 2.25λo × 1 +(3.5λo) × 2 + 3λo × 3
= 18.25 λo and ᐃφ =
× ᐃx = Create a free account to view solution
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