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An object is located 20.0 cm from a convex lens. The lens focuses light at a distance of 10.0 cm. What is the image distance? A. 6.67 cm B. -6.67 cm C. -20.0 cm D. 20.0 cm
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An object is located 20.0 cm from a convex lens. The lens focuses light at a

distance of 10.0 cm. What is the image distance?

A. 6.67 cm
B. -6.67 cm
C. -20.0 cm
D. 20.0 cm

User Tmountjr
by
4.5k points

2 Answers

3 votes

The Answer Is: D. 20.0 cm

Explanation: I did the test :)

User Mark Volkmann
by
4.5k points
3 votes

The Answer Is : D. 20.0 cm

My Reason : These types of problems can all be solved using the lens or mirror equation.

1/20 +1/q= 1/10

q=20 cm

The image is formed behind the lens at 2f or the center of curvature.

It is real, inverted, and the same size as the object

User Ravi Parekh
by
4.7k points
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