q.1. If a convex mirror have an image length is 10 cm. How it is magnified when object at 50 cm and focal Length is 25 cm. Find the nature of image ?
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Answer:u=−15cm
f=−10cm
h=1cm
From mirror formula
f
1
=
u
1
+
v
1
v
1
=
f
1
−
u
1
v
1
=
−10
1
−
−15
1
v=−30cm
The image is formed at a distance 30cm on the left side of the mirror from the pole.
m=
h
h
′
=
u
−v
h
′
=−1×
−15
−30
h=−2cm
The image size is 2cm and it is real and inverted.
Explanation:
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