Question

materials do not allow light to pass through them.​

Answer 1

Answer:

opaque materials do not allow light to pass through them

Answer 2

There are three types of materials.

Opaque:

These kind of materials do not leave light to pass through them.

Example:
Wall

Translucent:

Leaves a little light to pass through.

Example: butter paper

Transparent:
Leaves light to pass through.

Example:
Glass