Which statement is correct for a ray of light passing between different media?
The frequency of a light wave increases when it passes from air into glass.
The refractive index of glass is equal to the speed of light in glass divided by the speed of light in a vacuum.
Total internal reflection can occur when light is incident on a boundary from a medium of lower refractive index to a medium of higher refractive index.
For a light ray passing from air into glass, the ratio of the sine of the angle of incidence to the sine of the angle of refraction is equal to the refractive index of the glass.
216 exam-style questions on CIE IGCSE Physics 3.2 Light, covering 3.2.1a Reflection of light, 3.2.1b Images in a plane mirror, 3.2.2 Refraction of light, 3.2.2a Refraction of light, 3.2.2b Total internal reflection, 3.2.2c Refractive index and critical angle, 3.2.2d Optical fibres, 3.2.3a Converging and diverging lenses, 3.2.3b Ray diagrams and the nature of images, 3.2.3c Virtual images and the magnifying glass, 3.2.3d Correcting long-sightedness and short-sightedness, and 3.2.4 Dispersion of light. Each one has a worked solution and a mark scheme showing where the marks go.