Question
Physics Question on Ray optics and optical instruments
Consider a ray of light travelling from a denser to a rarer medium. If it is incident at the critical angle then
A
it will emerge out into the rarer medium
B
it will undergo total internal reflection
C
it will travel along the interface separating the two media
D
it will retrace its path
Answer
it will travel along the interface separating the two media
Explanation
Solution
If a ray of light travelling from a denser to a rarer medium with angle of incidence same as critical angle, the ray will travel along the interface separating the two media.