Question

Which of the following object is/are not opaque?

• A. Air
• B. Water
• C. Mirror
• D. Lens

Answer 1

Answer: (A), (B)

The correct options are
A

Air

B

Water

Opaque objects don't allow the light to pass through it. Among the given objects, metal sheet and the mirror doesn't allow light to pass through. A beam of light will get reflected or absorbed after encountering a mirror and metal sheet. Hence, they are opaque. Glass slab is a transparent object which allows light to completely pass through it. Thin plastic sheets partially allow light through it. Hence, these two are not opaque, and the required answer