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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I don’t know a good way to explain this to a literal child, but here’s my best attempt:
Light comes in individual little bits that we call photons. Photons are little points, literally so small they have no length or width or depth. However, despite being little points, they still carry energy. When they hit things, they transfer that energy. For example, photons from the sun will hit your skin and you’ll feel that energy as heat. Your eyes are just fancy machines that uses all the little photons hitting it to paint a picture of the world.
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