Light waves are traveling through glass. If the wavelength of some part of the light wave is 4 x 10-7 m and the frequency of that light is 5 x 1014 Hz, what is the speed of light through the glass?

Answer 1

speed is measured in m/s, so it is clear that

v = (4*10^-7m)*(5*10^14/s) = 2*10^8 m/s

Answer 2

thank you