Position and Size of Image Formed

Q.

A 2 cm high object is placed at a distance of 20 cm from a concave mirror. A real image is formed 40 cm from the mirror. Calculate the focal length of the mirror and the size of the image. [3 MARKS]

Q. What happens to the following light rays after reflection from a concave mirror?
1. A ray of light passing through the C
2. A ray of light passing throgh F
3. A ray of light parallel to the principal axis.

Q. An object is placed between a convex and a concave mirror. The pole of the convex mirror coincides with the centre of curvature of the concave mirror. Suppose an object is placed at the focus of the concave mirror. What will be the nature of the image formed by the concave mirror of the image formed by the convex mirror?

1. Erect, virtual, and diminished
2. Inverted, real, and enlarged
3. Erect, real, and enlarged
4. Inverted, real, and diminished

Q. How far should an object be kept from the concave mirror of focal length 20 cm to form a real image one-fifth of its size?

Q. A concave mirror has a focal length of $20cm$. The distance between the two positions of the object for which the image size is double of the object size is

1. $20cm$
2. $40cm$
3. $60cm$
4. $30cm$

Q.

At what distance from a concave mirror of focal length 25 cm should an object be placed ? so that the size of image is equal to the size of object ___

Q.

An object is placed at a distance of 10 cm from a concave mirror of radius of curvature 0.6 m. Which of the following statement is incorrect?

1. The image formed is real.

2. The image is at 1.5 times the distance of the object.

3. The image is formed at a distance of 15 cm from the mirror.

4. The image formed is virtual and erect.

Q. An object 4 cm high is placed at a distance of 10 cm from a convex mirror of radius of curvature 30 cm. Find the image distance.

1. - 4 cm
2. - 5 cm
3. 10 cm
4. 6 cm

Q. A convex lens forms an image of an object on a screen $30cm$ from the lens. When the lens is moved $90cm$ towards the object, then the image is again formed on the screen. Then, the focal length of the lens is

1. $13cm$
2. $24cm$
3. $33cm$
4. $40cm$

Q.

When an object of height 1 cm is kept at a distance of 4 cm from a concave mirror, its upright image of height 1.5 cm is formed at a distance of 6 cm behind the mirror. Calculate the focal length of the mirror ___

Q. An object 4 cm high is placed at a distance of 10 cm from a convex mirror of radius of curvature 30 cm. Find the image distance.

1. 6 cm
2. - 4 cm
3. 10 cm
4. - 5 cm

Q.

At what distance from a concave mirror of focal length 25 cm should an object be placed ? so that the size of image is equal to the size of object ___