A monochromatic plane wavefront enters glass from air at oblique incidence
PHYSICS · Single correct · A Level · Physics · Waves · Waves
Problem
A monochromatic plane wavefront enters glass from air at oblique incidence. Four students predict the change in wavelength and direction inside glass (refractive index 1.5). Which prediction is correct?
(a) The wavelength inside glass becomes 1.5 times larger and the wavefronts bend towards the normal
(b) The wavelength inside glass becomes 1.5 times smaller and the wavefronts bend towards the normal
(c) The wavelength inside glass becomes 1.5 times smaller while the wavefront direction remains unchanged
(d) The wavelength inside glass becomes 1.5 times smaller and the wavefronts bend away from the normal