Under which conditions does total internal reflection of light occur?
The light travels from a more optically dense medium to a less optically dense medium, and the angle of incidence is greater than the critical angle.
The light travels from a less optically dense medium to a more optically dense medium, and the angle of incidence is greater than the critical angle.
The light travels from a more optically dense medium to a less optically dense medium, and the angle of incidence is less than the critical angle.
The light travels from a less optically dense medium to a more optically dense medium, and the angle of incidence is less than the critical angle.
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.