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A 35mm wide slide with a 24mm×36mm picture is projected on a screen placed 12cm from the slide. The image of the slide picture on the screen measures 1m×1.5m. What is the linear magnification of the projector-screen arrangement?

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A 35mm wide slide with a 24mm×36mm picture is projected on a screen placed 12cm from the slide. The image of the slide picture on the screen measures 1m×1.5m. What is the linear magnification of the projector-screen arrangement?

(a) 150.6

(b) 1736

(c) 1524

(d) 41.67

I have been asked this question in an international level competition.

The doubt is from Units and Measurements in portion Advanced Engineering Materials of Engineering Physics II

1 Answer

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Right choice is (d) 41.67

To elaborate: Areal magnification = (1×1.5)/(24×10^-3×36×10^-3) = 1736

Linear magnification = √1736 = 41.67.

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