How are excited electrons related to street lights, advertising signs and lasers?

February 28 1 Comment Category: Advertising

I know the theory behind it – when an element is heated its electrons can absorb energy and the electron jumps to a higher energy level. When the electron jumps back it emits a photon of a certain colour.

So, how is this related to street lights, advertising signs and lasers?

They are light emitting, which means they give off photons.

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  1. They are light emitting, which means they give off photons.
    References :

    N 28 February 2009 at 5:59 pm Permalink

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