Question

electromagnetic waves can reflects .....how???

Answer 1

Electromagnetic waves can reflect, because they follow the Fermat's principle, that they take the path of least time. When a ray approaches an opaque medium which it can not enter, then it either gets absorbed or gets reflected. For non-shiny and dark media like coal, it absorbs the rays. For shiny media like opaque ground glass and the surfaces of most metals, it reflects the rays.

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