Multiple Choice
When an object is placed 60. cm from a converging lens, it forms a real image. When the object is moved to 40. cm from the lens, the image moves 10. cm farther from the lens. What is the focal length of the lens?
A) 20. cm
B) 40. cm
C) 30. cm
D) 50. cm
E) 42. cm
Correct Answer:
Verified
Correct Answer:
Verified
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