Question

an object of size 2.0cm is placed perpendicular to the principal axis of concave mirror the distance of object from the mirror equal the radius of curvature.the size of image will be ??

Answer 1

Answer:

ans: 2.0cm

Explanation:

it is very simple as we know all the 6 case of image formation on concave mirror

Any object placed on the centre of curvature will form a image of same size on the centre of curvature itself

as shown in the photo the oject is with black color arrow and the image is with red color arrow

Answer 2

Note: The correct question must be provided with following options-

An object of size $2.0 cm$ is placed perpendicular to the principal axis of a concave mirror. The distance of the object from the mirror equals the radius of curvature. The size of the image will be-

a)$0.5cm$

b) $1.5cm$

c) $1.0cm$

d) $2.0cm$

Explanation for correct option

d:

1. A $2.0cm$ object is positioned perpendicular to the principal axis of a concave mirror.
2. The object's distance from the mirror equals the radius of curvature.
3. As a result, when the object is placed at the centre of curvature $C$, the image formed is also at the centre of curvature $C$.
4. The image is the same size as the object and is both real and inverted.

As a result, the image will be $2.0 cm$ in size.

Explanation for incorrect options

a,b,c:

Since the object is placed at the centre of curvature $C$, the image also be formed at the centre of curvature $C$ of the same size as that of the object which is $2.0cm$ in this case.

However, the image will be inverted and real.

Now, since the image size is neither $0.5cm$, $1.5cm$ nor $1.0cm$.

Thus, options a,b and c are incorrect.

Hence, option d) is correct.

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