Question

One frame of a film in a projector is about 50 mm high. The film isOne frame of a film in a projector is about 50 mm high. The film is projected onto a giant screen. The image of the film frame is 16 m high..
a.) What is the scale factor of this enlargement?
b.) A penguin is 35 mm high on the film. How high is the penguin on the screen?

Answer 1

The frame of film is actually 50 mm high, but it looks 16 m high on the screen.

Remember that 1 m = 1,000 mm.

So everything looks (16,000)/(50) = 320 times as big on the screen
as it is on the film. That's called the scale factor.

The penguin is 35 mm high on the film. He'll look 320 times bigger on the screen.

(320) x (35 mm) = 11,200 mm = 11.2 meters high