Question

Why are walls generally made of opaque materials?​

Answer 1

Answer:

The light does not pass directly through the materials. ... Opaque objects block light from traveling through them. Most of the light is either reflected by the object or absorbed and converted to thermal energy. Materials such as wood, stone, and metals are opaque to visible light.

Answer 2

Walls are generally made of opaque materials so that people can't see through. It makes the place safer.

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