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Q: Which of the following is not used to make lenses?
  • A. Soil
  • B. Water
  • C. Glass
  • D. Plastic
Correct Answer: Option A - Transparent medium is used in making lenses that allow rays of light to pass through them, such as Glasses, water, plastics etc. while opaque mediums are not used because they do not allow light rays to pass through them . Such as soil, iron etc.
A. Transparent medium is used in making lenses that allow rays of light to pass through them, such as Glasses, water, plastics etc. while opaque mediums are not used because they do not allow light rays to pass through them . Such as soil, iron etc.

Explanations:

Transparent medium is used in making lenses that allow rays of light to pass through them, such as Glasses, water, plastics etc. while opaque mediums are not used because they do not allow light rays to pass through them . Such as soil, iron etc.