14. Light

Total internal reflection

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...

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THIN CONVERGING AND DIVERGING LENSES

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...

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Reflection of light

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...

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