Total internal reflection occurs when: The ray of light passes from a denser to a less dense medium; The angle of incidence in the denser medium is greater than the critical angle. The critical angle is defined as the angle of incidence in the optically dense medium...
Lenses can be divided into two types, depending on their shape: Converging lenses are fatter in the middle than at the edges; Diverging lenses are thinner in the middle than at the edges. Features of lenses: 1. The optical centre, C – the point midway between the lens...
The reflection of a light ray can be investigates using a ray box and a plane mirror. The normal is the line drawn perpendicular to the mirror. The angle of incidence is the angle between the incident ray and the normal. The angle of reflection is between the...