First slide

Spherical/Curved mirrors

Question

An object of size 7.5cm is placed in front of a convex mirror of radius of curvature 25cm at a distance of 40cm. The size of the image should be

Moderate

A

2.3cm
B

1.78cm
C

1cm
D

0.8cm

Solution

By using
$\frac{I}{O} = \frac{f}{f - u} \Rightarrow \frac{I}{+ (7 .5)} = \frac{(25 / 2)}{(\frac{25}{2}) - (- 40)} \Rightarrow I = 1 .78 cm$

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