Can you draw the same diagram for a convex
mirror?
See fig.-5 The parallel rays appear to diverge after
reflection. If we extend the reflected rays backwards
they meet at âFâ i.e.
focus of the convex mirror.
When parallel rays are incident on a concave mirror, on reflection they
meet at the focus.
Do we get an image with a concave mirror at the focus every time? Let
us find out.
Lab Activity
Aim:
Observing the types of images and measuring the object distance
and image distance from the mirror.
Material required:
A candle, paper, concave mirror (known focal
length), V-stand, measuring tape or meter scale.
Procedure:
Place the concave mirror on V-stand, arrange a candle and
meter scale as shown in fig.-6.
Keep the candle at different distances from the mirror (10cm to 80cm)
along the axis and by moving the paper (screen) find the position where
you get the sharp image on paper. (Take care that flame is above the axis of
mirror, paper is below the axis).
focus of the convex mirror.