the radius of curvature of a mirror is 20cm the focal length is:
a)20cm
b)10cm
c)40cm
d)5cm
Answers
Answered by
18
Hey!!
B) 10 is the right answer...
Hope its Help you!!
B) 10 is the right answer...
Hope its Help you!!
nikita9822:
its wrong the answer is 20cm
Answered by
6
focal length will be half of radius(centre)
so focal length will be 20/2=10 cm
correct answer is (b) one
so focal length will be 20/2=10 cm
correct answer is (b) one
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