Gravity on the moon is about 1/6th the gravity felt on the Earth. This is because
2 answers:
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Answer:
Focal length is 6.67 cm.
Explanation:
Object distance, u, from the lens = 10 cm
Image distance, v, to the lens = 10 cm + 10 cm
= 20 cm
Apply the lens formula to determine the focal length, f, of the lens.
=
+
= +
=
=
Find the inverse of both sides, so that;
f =
= 6.67
f = 6.67 cm
The focal length of the lens is 6.67 cm.