Question

1. Identify the device used as a spherical mirror or
lens in following cases, when the image formed
is virtual and erect in each case.
(a) Object is placed between device and its focus,
image formed is enlarged and behind it.
(b) Object is placed between the focus and device,
image formed is enlarged and on the same
side as that of the object.
(c) Object is placed between infinity and device,
image formed is diminished and between
focus and optical centre on the same side as
that of the object. ​

Answer 1

Answer:

(a) When object is placed between pole of a concave mirror and its focus,  image formed is enlarged and behind it.

(b) When object is placed between the focus and optical centre of convex lens,  image formed is enlarged and on the same  side as that of the object.

(c) When object is placed between infinity and optical centre of concave lens,  image formed is diminished and between  focus and optical centre on the same side as  that of the object. ​

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