A boy is trying to start a fire by focusing sunlight on a piece of paper using an equal convex lens of focal length 10 cm. The diameter of the sun is 1.39 x 109 m and its mean distance from the earth is 1.5 x 1011 m. What is the diameter of the image on the paper?
A. 9.2 x 10-4 m
B. 6.5 x 10-4 m
C. 6.5 x 10-5 m
D. 12.4 x 10-4 m
Answer:
A. 9.2 x 10-4 m
What is the diameter of the image on the paper?
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