1 answer

20. In a cinema, a picture 2.5 cm wide on the film is projected to an...

Question:

20. In a cinema, a picture 2.5 cm wide on the film is projected to an image 3.0 m wide on a screen that is 18.0 m away. What
20. In a cinema, a picture 2.5 cm wide on the film is projected to an image 3.0 m wide on a screen that is 18.0 m away. What is the focal length of the lens? (Ans: f= 15.0 cm)

Answers

a 1800-a 2.5cm D 300cm E limage (obiect) in. A ABC & AADE a 2.5 1800-a 300 CL = 14.87cm tol- It I do di 1800-a á + = I I + f

.

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