- Reflection.
- Refraction.
- Diffraction.
- Dispersion.
Explanation:
When the light strikes on a surface nearly parallel to it, it then bends by a small and fixed angle after reflection. Also, when the light travels from one medium to another with slight differences in their refractive indices, it bends by a small angle. Thus, the bending of light by a small but fixed angle can be the case of either reflection or refraction.
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
A wire is broken in four equal parts. A packet is formed by keeping the four wires together. The resistance of the packet in comparison to the resistance of the wire will be
|
(a) Equal |
(b) One fourth |
(c) One eight |
(d) |
The effective resistance between the points A and B in the figure is
|
(a) 5Ω |
(b) 2 Ω |
(c) 3 Ω |
(d) 4 Ω |
The S.I. unit of radioactivity is
|
(a) Roentgen |
(b) Rutherford |
(c) Curie |
(d) Becqueral |

Two point charges +3μC and +8μC repel each other with a force of 40N. If a charge of -5μC is added to each of them, then the force between them will become
|
(a) - 10 N |
(b) +10 N |
(c) +20 N |
(d) - 20N |