Tristan10

​Hi My name is Tristan, I live on a dairy farm at Berwick. I like tractors but the best is Case International Harvesters. Why do binoculars have prisms in them?

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The bent light beams race through the body of the binoculars and bounces off the two prisms before they pass through the eyepiece and enter your eyes. One lense turns the image upside down, but an even number of lenses will keep the image up right. The specially shaped prisms are used for reflecting the light, so the binoculars don't look like two long telescopes.