1
(a)
Reflected light: (wavelength, frequency, speed same as incident
light)
l  = 589 nm, n = 5 09 ´ 1014 Hz, c = 3 00 ´ 108 m s–1
(b)
Refracted light: (frequency same as the incident frequency)
n = 5 09 ´ 1014Hz
v = (c/n) = 2