| 1 |
The speed of sound through water. |
- A. 340 meter per second
- B. 1500 meter per second
- C. 5000 meter per second
- D. 500 meter per second
|
| 2 |
Speed oflight travels is one second. |
- A. 200,000 km
- B. 300,000 km
- C. 400,000 km
- D. 500,000 km
|
| 3 |
What one of the followig object emit its light. |
- A. Wood
- B. Brick
- C. Sun
- D. Soil
|
| 4 |
Which thing is not bright. |
- A. Book
- B. Candle
- C. Bulb
- D. Sun
|
| 5 |
Which things are transparent objects. |
- A. Water
- B. Glass
- C. Air
- D. All of these
|
| 6 |
Tissue paper allows it to pass through |
- A. Complete light
- B. Some part of light
- C. Special light
- D. Inadequste light
|
| 7 |
Moon is |
- A. Luminous object
- B. Ligh emitting object
- C. Non-luminous object
- D. Opaque object
|
| 8 |
____________ light is the reiurs of light when it hits as opaque surface. |
- A. Refraction
- B. Reflection
- C. Dis persion
- D. Echo
|
| 9 |
Non -illuminated object that are illuminated by heating are called. |
- A. Transparent object
- B. Opaque object
- C. Burning object
- D. Semi transparent
|
| 10 |
How does light travel in air. |
- A. In a circle
- B. Along curved path
- C. Along a straight line
- D. In dispersed path
|
