Question
Differentiate between the following:
Light and sound waves.
Light and sound waves.
✓
Answer
| Light waves | Sound waves |
| 1. These are electromagnetic waves. | 1. These are mechanical waves. |
| 2. They can travel in vacuum. | 2. They re qui re a materia I medium for propagation. |
| 3. The speed of light waves is very high ( $= 3 x 10^8$ m/s in air). | 3. The speed of sound waves is low ($ =3 30 $m/s in air). |
| 4. The wavelength of the light waves (visible) is very small, of the order of $10-6 m.$ | 4. The wavelength of sound waves is in the range of $10-2$ m to lOm. |
| 5. These waves are transverse. | 5. These waves are lonaitud ina I waves. |
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