Q182
General SciencePhysics
When light is refracted, which of the following does not change?
- a.Wavelength
- b.Frequency
- c.Velocity
- d.Amplitude
Answer: (B) Frequency
Frequency is fixed by the source, so it stays the same when light passes into another medium. Speed and wavelength both change ($v = f\lambda$), and amplitude usually drops because some light is reflected at the boundary.