Question

1.Find the focal length of a convex mirror whose radius of curvature is 32 cm
2.A concave mirror produces three times magnified (enlarged) real image of an object placed at 10 cm in front of it. Where is the image located?
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Answer 1

Answer:

1. radius of curvature of a convex mirror is 32cm. 16 cm is the focal length of the convex mirror is 16cm.

$f \: = \: \frac{r}{2} = \frac{32}{2} = 16$

Given magnification m=3

and object distance u=10 cm and we know,

Magnification m= -v/u

−v=3×−10

v=30 cm

Thus the image is formed at distance of 30 cm.