Question

Monochromatic green light that has a frequency of 5.7x10^(14) Hz enters a piece of zircon. What is the wavelength of the light in the glass?

Answer 1

frequency remains constant in all medium

v = f* lambda

for vaccume = c = f * 1 ...........1

3*10^8 = 5.7*10^14 *1

1 = 3*10^8 / ( 5.4*10^14) =5.55555556e-7 m

for refractive index of zircon n = =1.93

c/ n = f *2 .............2

from 1 and 2

n = 1/2

2 = 1/ n =5.55555556e-7 /1.98 =2.80583614e-7  

2 = 2.8*10^-7 m answer