Question

please help me in solving this

Answer 1

Hi____
do you know
v=c/n
here c velocity of light
n=refrective index
v = velocity of light in medium
so for glass which n=3/2
v(glass)=c/3/2=2c/3
for water which n=4/3
v(water)=c/4/3=3c/4
ratio is
v(glass)/v(water)=2c/3/3c/4
=8/9
so ratio of glass and water 8:9
hope it help u