Image Formation of 2D Objects

Q. A rod of length 10 cm lies along the principal axis of a concave mirror of focal length 10 cm in such a way that the end closer to the pole is 20 cm away from it.
Find the length of the image.

1. 10 cm
2. 8 cm
3. 5 cm
4. None of these

Q. A square ABCD of side 1 mm is kept at distance 15 cm in front of the concave mirror as shown in figure. The focal length of the mirror is 10 cm. The length of the perimeter of its image will be

1. 8 mm
2. 2 mm
3. 12 mm
4. 6 mm

Q.

An object is placed at the centre of curvature of a concave mirror of radius of curvature $20cm$ and focal length $10cm$. At what distance from the pole will its image be formed?

Q. Find the distance between object $\left(O\right)$ and final image formed after two successive reflections. Take the first reflection on mirror $M_1$ having radius of curvature $20\text{cm}$

1. $20\text{cm}$
2. $15\text{cm}$
3. $35\text{cm}$
4. $40\text{cm}$

Q. A U-shaped wire is placed before a concave mirror having radius of curvature 20 cm as shown in figure. Find the total length of wire in the image.

1. 10 cm
2. 20 cm
3. 30 cm
4. 5 cm

Q. A rod of length 10 cm lies along the principal axis of a concave mirror of focal length 10 cm in such a way that the end closer to the pole is 20 cm away from it.
Find the length of the image.

1. 10 cm
2. 8 cm
3. 5 cm
4. None of these

Q. A spherical mirror produces an image of magnification -1 on a screen placed at a distance of 50 cm from the mirror.
(a) Write the type of mirror.
(b) Find the distance of the image from the object.
(c) What is the focal length of the mirror ?
(d) Draw the ray diagram to show the image formation in this case.

Q. A U-shaped wire is placed before a concave mirror having radius of curvature 20 cm as shown in figure. Find the total length of wire in the image.

1. 10 cm
2. 20 cm
3. 30 cm
4. 5 cm

Q. A square ABCD of side 1 mm is kept at distance 15 cm in front of the concave mirror as shown in figure. The focal length of the mirror is 10 cm. The length of the perimeter of its image will be

1. 8 mm
2. 2 mm
3. 12 mm
4. 6 mm

Q. A U-shaped wire is placed before a concave mirror having radius of curvature 20 cm as shown in figure. Find the total length of wire in the image.

1. 10 cm
2. 20 cm
3. 30 cm
4. 5 cm

Q. A square ABCD of side 1 mm is kept at distance 15 cm in front of the concave mirror as shown in figure. The focal length of the mirror is 10 cm. The length of the perimeter of its image will be

1. 8 mm
2. 2 mm
3. 12 mm
4. 6 mm