| 1 |
Speed of light through air is about. |
- A. 300000 km/s
- B. 250000 km/s
- C. 225000 km /s
- D. 200000 km /s
|
| 2 |
There are ......... types of reflection |
|
| 3 |
It takes about.......... minutes for light from the Sun to reach the Earth. |
|
| 4 |
The pole of spherical mirror is also called. |
- A. Principal axis
- B. Focus
- C. Vertex
- D. Focal leangth
|
| 5 |
Image distance for a virtual image is always taken. |
- A. Zero
- B. +2
- C. Positive
- D. Negative
|
| 6 |
Through which of the following the light travels the fastest. |
- A. Prism
- B. Water
- C. Air
- D. Vacuum
|
| 7 |
In a convex mirror, focus is. |
- A. Under the mirror
- B. In front of the mirror
- C. On the mirror
- D. Behind the mirror
|
| 8 |
What happens when light hits a shiny or smooth surface. |
- A. It is disappeared
- B. It is refracted
- C. It is absorbed
- D. It is reflected
|
| 9 |
The image formed by a convex mirror is. |
- A. Real and upright
- B. Real and inverted
- C. Virtual and upright
- D. Virtual and inverted
|
| 10 |
-------------------- is/are used to coat the backside of the mirror. |
- A. Silver
- B. Copper
- C. Aluminium
- D. Silver and Aluminium
|
