Big Optics interactive, Science Museum, London, 1992.

 
Big Optics interactive, Science Museum, London, 1992.
4 0 c m
 
34cm
actual image size: 26cm x 32cm

Description

The giant lens in the Big Optics exhibit can be used as a magnifying glas. Unlike a normal lens which is curved, it is made from a flat sheet of plastic. This has tiny steps in it to bend the light as it comes through. This sort of lens is used in car headlights to make the beam of light spread in the right direction.

© Science Museum / Science & Society Picture Library

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