JEE Main & Advanced
Physics
Ray Optics
JEE PYQ-Ray Optics
question_answer
A light wave is incident normally on a glass slab of refractive index 1.5. If 4% of light gets reflected and the amplitude of the electric field of the incident light is \[30V\,{{m}^{-1}},\]then the amplitude of the electric field for the wave propagating in the glass medium will be- [JEE Main 12-Jan-2019 Morning]
A)\[24V\,{{m}^{-1}}\]
B)\[10V\,{{m}^{-1}}\]
C)\[30V\,{{m}^{-1}}\]
D)\[6V\,{{m}^{-1}}\]
Correct Answer:
A
Solution :
[a] and be the perpendicular components of the electric field for transmitted and incident waves respectively.