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प्रश्न
The speed of light in air is :
पर्याय
3 x 108 m s-1
330 m s-1
5100 m s-1
3 x 1010 m s-1
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उत्तर
The speed of light in air is : 3 x 108 m s-1
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संबंधित प्रश्न
Write true or false for a given statement.
A sound is a form of energy.
'Note' is a sound :
State the speed of (i) light and (ii) sound in air?
For which range of frequencies, human ears are most sensitive?
How is sound perceived by us?
Can you hear the sound produced due to the vibrations of second's pendulum?
Match the following.
| 1. | Tuning fork | The point where density of air is maximum |
| 2. | Sound | Maximum displacement from the equilibrium position. |
| 3. | Compressions | The sound whose frequency is greater than 20,000 Hz. |
| 4. | Amplitude | Longitudinal wave. |
| 5. | Ultasonics | Production of sound. |
If the energy in a longitudinal wave travels from south to north, the particles of the medium would be vibrating in _____.
Waves created by Earth Quake are Infrasonic.
Draw a curve showing density or pressure variations with respect to distance for a disturbance produced by sound. Mark the position of compression and rarefaction on this curve. Also, define wavelengths and time periods using this curve.
