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ICSE Class 8 Physics Question 8 of 23

Light Energy — Question 10

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Question

Question 10

Explain the following terms:

(a) Pole

(b) Centre of curvature

(c) Radius of curvature

(d) Principal axis

Show them on separate diagrams for each of the concave and convex mirrors.

Answer

(a) Pole — The geometric centre of the spherical surface of the mirror is called the pole of the mirror. It is represented by the symbol P.

(b) Centre of curvature — The centre of curvature of a mirror is the centre of the sphere of which the mirror is a part. It is represented by the symbol C.

(c) Radius of curvature — The radius of curvature of a mirror is the radius of the sphere of which the mirror is a part. It is represented by symbol R.

(d) Principal axis — It is a straight line joining the pole of the mirror to its centre of curvature.

Explain Pole, Centre of curvature, Radius of curvature, Principal axis. Show them on separate diagrams for each of the concave and convex mirrors. Light Energy, Concise Physics Solutions ICSE Class 8.