Which statement is correct when a ray of light passes from air into a transparent medium of refractive index nnn?
The wavelength of the light in the medium is equal to its wavelength in air multiplied by nnn.
The speed of light in the medium is equal to the speed of light in a vacuum divided by nnn.
The angle of refraction is always greater than the angle of incidence.
The frequency of the light decreases when it enters the medium.
100 exam-style questions on CIE IGCSE Physics 3.2.2 Refraction of light. Each one has a worked solution and a mark scheme showing where the marks go.