Science
(a) What type of lens always forms a virtual erect and diminished image?
(b) List two uses of such a lens.
Refraction Lens
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Answer
(a) Concave lens
Explanation — The lens that always forms a virtual, erect and diminished image is a concave lens (diverging lens). A concave lens causes parallel rays of light to diverge outward, making them appear to come from a point behind the lens.
(b) Two uses of concave lens:
- Correction of myopia (short-sightedness).
- Used in peepholes or door eye to provide a wider field of view.
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