Question

how does refraction occur ?​

Answer 1

Answer:

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Answer 2

Answer:

When light travels from air into water, it slows down, causing it to change direction slightly. This change of direction is called refraction. When light enters a more dense substance (higher refractive index), it 'bends' more towards the normal line.

To describe the properties of waves, you are always bound to use the following formula:

v=λ⋅fv=λ⋅f

If you look at the phenomenon of refraction, change of angles, you can explain it by using Huygen’s Fresnel principle, which states that every point on a wavefront is itself the source of spherical wavelets. The sum of these spherical wavelets forms the wavefront.