The image of an object formed by the device is always virtual and small.The device may be --------

Options :
  1. a glass plate
  2. concave lens
  3. concave mirror
  4. none of the above
Answer and Explanation :-

Answer: Option 2

Explanation:

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Though I do not believe that a plant will spring up where no seed hasbeen, I have great faith in a seed. Convince me that you have a seedthere, and I am prepared to expect wonders.
-Henry David Thoreau