Question

Classify vacuum as (a) transparent medium (b) translucent medium (c) opaque bodies.

Answer 1

1. Transparent Medium allows most of the light energy to pass through it. For example glass, air, vacuum.
2. Translucent Medium partially allows the light energy to pass through it. For example, ground glass, muddy water, smoke, dust-filled air.
3. Opaque Bodies do not allow light energy to pass through them. For example, bricks, stones, wood.

Hence, vacuum is a transparent medium.