The refractive index of glass with respect to water is 9//8. If the velocity and wavelength of light in glass are 2 times 10^8 m//s and 4000 A respectively, find the velocity and wavelength of light in water.

The refractive index of glass with respect to water is 9//8. If the ve

1.	The refractive index of glass with respect to water is 9//8. If the velocity and wavelength of light in glass are 2 times 10^8 m//s and 4000 A respectively, find the velocity and wavelength of light in water.
Answer» SOLUTION :`_w mu_g=mu_g/mu_w=v_w/v_g implies 9/8=v_w/(2 times 10^8),` `v_w=(9 times 2 times 10^8)/8=2.25 times 10^8 m//s` `_m mu_g= mu_g/mu_q= lamda_w/lamda_g` `(because mu_g= lamda/lamda_g, mu_w=lamda/lamda_w)9/8= lamda_w/4000, lamda_w=(9 times 4000)/8=4500A^c`