My son wants to know how we can perceive light and it not take up any space at the same time.
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Light doesn’t occupy space, but you can perceive the energy from light because you have cells that specially formed just to understand the energy that is being directed at you. You can notice the effect with light (obvious), but also with heat, and in a completely different way, with sound. Sound doesn’t occupy space, it creates distortions in the matter around you.
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