Question

When does light behave as a wave?

Answer 1

light is an electromagnetic wave where the magnetic wave and electric wave feeds each other

wave nature of light is a prprty of light

these things show it has a wave nature:

refraction

reflection

defraction

polarisation

interference

Answer 2

when light moves from one medium like air to another medium like water it will change direction this is a wave like behaviour and is called refraction in this way light behaves like other waves suggest some ways the speed of the light wave also change when it moves from medium to medium

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