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Q & A: Seeing the light.

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Most recent answer: 11/28/2013
Hi, If time slows down the closer you get to the speed of light using Eitein's theory of relativity then how can we see light? Surely it is traveling at the speed of light so time has stopped meaning that it would transverse distances instantly in our view. How would we be able to detect it and then surely it's speed would be infinite as our time would have stopped whilst it is moving. Thanks for the help
- Tristan Warren (age 17)
Leamington Spa, Warwickshire, England

Hello Tristan,

In order to "see" light the light has to come to you in the form of photons.   You won't see light if it just whizzes by and doesn't interact with your retina. Once inside the eye a photon will hit one of many light sensitive rods or cones in the retina and set of a tiny electrical response to the brain which is interpreted as "seeing the light".  If you are interested in how we can distinguish colors you might take a look at .


(published on 11/28/2013)

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