Question

see note 3 and ans my question....very urgent....coming for exam

having a doubt

it's written as the object is moved away from a concave mirror it forms real inverted and ENLARGE
(and enlarge means to become larger)
but then after this it's written -its becomes very very small.
how come it becomes very very small when it's written before it that as the object moves away from a concave mirror it forms real inverted and enlarge image(which means as the distance increases the image should become real inverted and enlarge)but after it it's written it becomes very very small.WHY?

Answer 1

When the object is very far from the concave mirror, the image is at the focus and it is a diminished, inverted image. As the object is brought towards the mirror, the image shifts away from the mirror and its size increases. When the object is at centre of curvature of the mirror, the image is also at the centre of curvature and it is of size equal to the size of object. By further bringing the object towards the mirror, the image gets magnified and it moves away from the centre of curvature. When the object is at the focus of mirror, the image is at infinity. If the object is further moved towards the mirror, the image now becomes erect and magnified and it is formed behind the mirror.

Answer 2

see in case of concave mirror image become larger when we move object from infinity to focus but when we move away it become smaller. after focus it form virtual image.

hope it help