Question

look at the wavefronts as they enter the glass. what happens to the speed, wavelength, and frequency of the the wave? speed: [ select ] wavelength: [ select ] frequency: [ select ]

Answer 1

Index of refraction = speed of light in air / speed of light in medium

The speed of light must decrease if index of refraction > 1

V = f λ speed of light = frequency * wavelength

The frequency of light is constant (for continuity) so the wavelength must decrease as light enters glass