Draw a diagram to explain the following terms.
pole of a mirror, principal axis, concave surface, focus, centre of curvature

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Solution

Pole:
The centre of a mirror is known as its pole (P).

Principal axis:
The straight line passing through the centre of curvature and pole of a mirror is called principal axis.

Concave surface:
A bent-in surface of concave mirror at which reflection of light takes place is called concave surface.

Focus:
Focus (F) is a point in front of a mirror at which all the parallel rays of light converge after getting reflected from the concave mirror.

Centre of curvature:
Centre of curvature (C) is the centre of the hollow sphere of glass of which the mirror is a part.

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Question 30
Draw ray diagrams showing the image formation by a concave mirror when an object is placed

(a) between pole and focus of the mirror
(b) between focus and centre of curvature of the mirror
(c) at centre of curvature of the mirror
(d) a little beyond centre of curvature of the mirror
(e) at infinity

Q. The image of a real object, placed perpendicular to the principal axis of a concave mirror, will be virtual and erect if the position of object is
(a) At centre of curvature C
(b) Between F and centre of curvature C
(c) Between pole P and focus F
Choose the correct option among the following.

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Draw a diagram to explain the following terms. pole of a mirror, principal axis, concave surface, focus, centre of curvature

Draw a diagram to explain the following terms.
pole of a mirror, principal axis, concave surface, focus, centre of curvature