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| Q. |
Decibel is the unit used for – |
| A. | Speed of light |
| B. | Intensity of heat |
| C. | Intensity of sound |
| D. | Radio wave frequency |
| Answer» C. Intensity of sound | |
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Explanation: The decibel (abbreviated dB) is the unit used to measure the intensity of a sound. The decibel scale is a little odd because the human ear is incredibly sensitive. Our ears can hear everything from your fingertip.brushing lightly over your skin to a loud jet engine. The decibel (dB) is a logarithmic unit that indicates the ratio of a physical quantity (usually power or intensity) relative to a specified or implied reference level. |
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