If radius of curvature of a mirror is 40cm the focal length is
a-40cm
b- 80cm
c- 10cm
d- 20cm
Answers
Answered by
3
Answer:
-40 cm
Step-by-step explanation:
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Answered by
4
Answer:
If radius of curvature of a mirror is 40 cm the focal length is 20cm
It is because r=2f
where r is radius and f is focal length
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