If a thin film of thickness t and refractive index $μ$ is placed in the path of light coming from a source S, then increase in length of optical path is
Answer & explanation
Correct answer: option 3
Increase in optical path = $μt-t=(μ-1)t$
If a thin film of thickness t and refractive index $μ$ is placed in the path of light coming from a source S, then increase in length of optical path is
Correct answer: option 3
Increase in optical path = $μt-t=(μ-1)t$