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PH2031 2

PHYSICS - Waves - Concave/General

When parallel rays shine towards a concave mirror, they reflect and focus (converge) onto a point
A concave mirror is also called a converging mirror
When the rays are parallel to the principal axis they converge at the principal focus, F
The point F on a ray diagram is called the principal focus
Focal length (f) is the distance from the mirror along the principal axis to the principal focus
Point C on the ray diagram is the centre of the sphere from which the mirror is cut
Point C on the ray diagram is known as the centre of curvature
The distance between the centre of the mirror to point C is the radius of curvature (R) of the mirror
Created by: Paul Brown