1. | Focal length of a plane mirror is ? | |
2. | A concave mirror is a part of a sphere of radius 30cm. It’s focal length is ? | |
3. | An object at a distance of + 15 cm is slowly moved towards the pole of a convex mirror. The image will get ? | |
4. | A ray of light is travelling from a rarer medium to a denser medium. While entering the denser medium at the point of incidence, it ? | |
5. | Light from the Sun falling on a convex lens will converge at a point called ? | |
6. | As light travels from a rarer to a denser medium it will have ? | |
7. | An object is placed at a distance of 0.25 m in front of a plane mirror. The distance between the object and image will be ? | |
8. | An object is placed 20 cm in front of a plane mirror. the mirror is moved 2 cm towards the object. the distance between the positions of the original and final images seen in the mirror is ? | |
9. | Under which of the following conditions a concave mirror can form an image larger than the actual object ? | |
10. | To obtain parallel ray from a point light source we use ? | |