Light from a sodium lamp with passes through a glycerin-filled tank of length and…

PHYSICS · Subjective · A Level · Physics · Waves · Waves

Problem

Light from a sodium lamp with

\lambda_0=589\,\text{nm}

passes through a glycerin-filled tank of length

20\,\text{m}

and refractive index

1.47

in time

t_1

. If it takes time

t_2

to traverse the same tank when filled with carbon disulfide of refractive index

1.63

, determine

t_2-t_1