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प्रश्न
Differentiate between the following:
Radio waves and light waves.
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उत्तर
| Radio waves | Light waves |
| 1. Radio waves are not visible to hum an eye. | 1. Light waves are visible to human eye. |
| 2. These waves range from 105 to 10-3 meters. | 2. These waves range from 10-6 to 10-7 meters. |
| 3. Frequency of radio waves is below 107 Hz. | 3. Frequency of light waves lie in the range 1014 to 1013 Hz. |
| 4. Its sources are TV and radio transmitters. | 4. Its sources are sunlight, white hot bodies. |
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संबंधित प्रश्न
Give one example to illustrate forced vibrations.
Differentiate between the forced and resonant vibrations.
When a body vibrates under a periodic force, the vibrations of the body are ______.
A tuning fork of frequency 256 Hz will resonate with another tuning fork of frequency:
Explain a tuning fork (vibrating) is held close to ear. One hears a faint sound. The same vibrating tuning fork is placed on table, such that its handle is in contact with table, one hears a loud sound.
When a tuning fork, struck by a rubber pad, is held over a length of the air column in a tube, it produces a loud sound for a fixed length of the air column. Name the above phenomenon. How does the frequency of the loud sound compare with that of the tuning fork? State the unit for measuring loudness.
What do you understand by free (or natural) vibrations?
What are the factors that affect the frequency of a vibrating string and how do they affect the frequency?
Explain free and forced vibrations. Give an experimental arrangement to illustrate the phenomenon of resonance.
