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| Q. |
Stationary wave is formed by – |
| A. | a transverse wave superposing a longitudinal wave |
| B. | two waves of the same speed superposing |
| C. | two waves of same frequency travelling in the same direction |
| D. | two waves of same frequency travelling in the opposite direction |
| Answer» D. two waves of same frequency travelling in the opposite direction | |
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Explanation: Stationary or standing waves are formed in a medium when two waves having equal amplitude and frequency moving in opposite directions along the same line, interfere in a confined space. Generally, such waves are formed by the superposition of a forward wave and the reflected wave. Both longitudinal and transverse types of waves can form a stationary wave. |
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