Concave Mirror

Q.

When an object is placed at the focus of a concave mirror, where will the image be formed?

1. Infinity

2. Focus

3. Center of curvature

4. Pole

Q.

Give a reason why concave mirrors are used by dentists?

Q.

In which of the following, the image of an object placed at infinity will be highly diminished and point sized?

1. Concave mirror

2. Convex mirror

3. Plane Mirror

4. Both plane mirror and concave mirror

Q. A concave mirror is also known as

1. converging mirror
2. diverging mirror
3. plane mirror

Q.

If 3 concave mirrors are cut from a sphere and put in the given set up and if the sun lies on the principle axis of mirror 2 at infinity, then at what position will the images of the sun be formed by three mirrors?

1. At $F_1$, $F_2$ & $F_3$.

2. at C.

3. at $P_1$, $P_2$ & $P_3$.

4. at $F_2$ only.

Q.

The concave mirrors are used in

Q.

Distinguished between a plane mirror, concave mirror and convex mirror without touching them.

Q. ntwhat is the sign convention if the concave mirror is inverted?n

Q. Give any two applications each of concave and convex mirror. [ 2 marks]

Q.

When I looked at a mirror, I found that my size and my image's size is the same. What could be the type of mirror that I am looking at?

1. Plane

2. Concave

3. Convex

4. None of the above

Q. If the object lies at the centre of curvature of a concave mirror, then the image is formed at:

1. pole
2. focus
3. centre of curvature
4. none of these

Q. An object is placed at the centre of curvature C of a concave mirror, the image will be formed at

1. Focus
2. Infinity
3. Between C and F
4. Centre of curvature C

Q.

A man standing in front of a special mirror finds his image having a very small head, a fat body and legs of normal size. What is the shape of : (a) top part of the mirror ? (b) middle part of the mirror ? (c) bottom part of the mirror ? Give reasons for your choice.

Q.

Define the aperture of a mirror.

Q. is a real inverted and enlarged image always formed by concave mirror?