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PH2031 2
PHYSICS - Waves - Concave/General
| Question | Answer |
|---|---|
| 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 |