Light diffusion

Classical Mechanics Level 1

An object we saw through a telescope has a very reddish tint, but we know it has many massive blue stars in it, why is it red?

It is to small for our brains to handle It is moving away from us It really has lots of red giants It is behind a red tinted nebulae

Kadin Ward by Kadin Ward , 15, USA

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2 solutions

This is due to the well-known Doppler effect in light

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Kadin Ward
Mar 14, 2019

If an object is approaching light speed in it's movement away from us, the light itself will begin to expend more and more energy to get to us, eventualy forcing it to the point it is undetectable.

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