Which of the following can form a virtual image which is always smaller than the object?(a) a plane mirror (b) a convex lens(c) a concave lens (d) a concave mirror
(c) a concave lens
Explanation
Diverging Lens or Concave Lens $-$ It is a lens that possesses at least one surface that curves inwards in the middle. In other words, it is thin across the middle and thick at the upper and lower edges, because of which the light that enters the lens, gets spread out, or diverges, which results in forming a smaller image. Due to this effect, it is also called a negative lens or a diverging lens.
The image formed by a concave lens is always virtual & erect, which means it will appear to be farther away than it actually is, and therefore smaller than the object itself.
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