Light travels in straight lines. When light hits an object, it is reflected (bounces off) and enters our eyes. This is how we see the object.
When light from an object is reflected by a surface, it changes direction. It bounces off the surface at the same angle as it hits it.
Smooth, shiny surfaces such as mirrors and polished metals reflect light well. Dull and dark surfaces such as dark fabrics do not reflect light well.
Reflective surfaces can be very useful.
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