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प्रश्न
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उत्तर
| Electromagnetic waves | Mechanical waves |
| 1. They can travel in vacuum. | 1. They cannot travel in vacuum. They need a materia I medium for their propagation. |
| 2. These are formed by the periodic vibrations of mutually perpendicular electric and magnetic field in a plane normal to the direction of wave propagation. | 2. These are formed by the vibrations of the medium particles about their mean positions. These vibrations can be along the direction of propagation of wave or perpendicular to it.. |
| 3. These are traverse in nature. | 3. These waves can be transverse as well as IonqitudnaI. |
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संबंधित प्रश्न
Name the characteristic of sound in relation to its waveform
Displacement distance graph of two sound waves A and B, travelling in a medium, are as shown in the diagram below.
Study the two sound waves and compare their:
1) Amplitudes
2) Wavelengths
A wave passes from one medium to another medium. Mention one property of the wave out of speed, frequency or wavelength which changes.
What is a stethoscope ? Name the principle on which a stethoscope works.
What are mechanical waves?
State two factors on which the natural frequency of a body depends.
A type of electromagnetic wave has a wavelength of 50 Å. Name the wave and state one use of this type of wave.
Why is an echo not heard when the distance between the source of sound and reflection body is less than 10 m?
