A concave mirror is a part of a sphere of radius 40 cm what is the focal length of this mirror
Answers
Answered by
2
Answer:20 cm
Explanation:
f = R/2
=>40/2
=20 cm
Answered by
0
Answer:
he radious of curvature is 40cm
We know that R=2f
Radious of curvature =twice of focal length
R=40cm
40=2f
f=40/2
f=20cm
Explanation:
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