1 |
Sound is produced by |
- A. Vibrating object
- B. Transparent object
- C. Opaque object
- D. Translucent object
|
2 |
Which things are transparent object. |
- A. Water
- B. Glass
- C. Air
- D. All of these
|
3 |
Tissue paper allows it to pass through |
- A. Complete light
- B. Some part of light
- C. Special light
- D. Inadequste light
|
4 |
The light reflected from the moon resches to earth. |
- A. 2.5 sec
- B. 3.5 sec
- C. 1.5 sec
- D. 0.5 sec
|
5 |
How does light travel in air. |
- A. In a circle
- B. Along curved path
- C. Along a straight line
- D. In dispersed path
|
6 |
Which things are transparent objects. |
- A. Water
- B. Glass
- C. Air
- D. All of these
|
7 |
Which things are not transparent objects. |
- A. wood
- B. Metal
- C. Stone
- D. All of these
|
8 |
Sound is a type of energy. |
- A. Electrical
- B. Mechanical
- C. Thermal
- D. Chemical
|
9 |
____________ light is the reiurs of light when it hits as opaque surface. |
- A. Refraction
- B. Reflection
- C. Dis persion
- D. Echo
|
10 |
Which thing is not bright. |
- A. Book
- B. Candle
- C. Bulb
- D. Sun
|