Answers Physics Lenses — QuizQuestion 3

3

QuizMultiple Choice

Lenses — Quiz

Question 3 • Physics

Which shows the correct lens equation?

Answer

A

1 over f is equal to the fraction with numerator 1 and denominator d sub i times the fraction with numerator 1 and denominator d sub o

B

1 over f is equal to the fraction with numerator 1 and denominator d sub o plus the fraction with numerator 1 and denominator d sub i

C

1 over f is equal to the fraction with numerator d sub o and denominator d sub i plus the fraction with numerator d sub i and denominator d sub o

D

1 over f is equal to the fraction with numerator 1 and denominator d sub o minus the fraction with numerator 1 and denominator d sub i

Explanation

The thin-lens equation is 1/f = 1/d_o + 1/d_i, where f is focal length, d_o is object distance, and d_i is image distance. This matches the choice stating that the reciprocals of the object and image distances are added.

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