question_answer

Light travels through a glass plate of thickness t and having refractive index n. If c is the velocity of light in vacuum, the time taken by the light to travel this thickness of glass is  [NCERT 1976; MP PET 1994; CBSE PMT 1996; KCET 1994; MP PMT 1999, 2001]

A)            \[\frac{t}{nc}\]                    

B)            \[tnc\]

C)            \[\frac{nt}{c}\]                    

D)            \[\frac{tc}{n}\]