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प्रश्न
A musical instrument is producing a continuous note. This note cannot be heard by a person having a normal hearing rang. This note must then be passing through.
पर्याय
water
wax
vacuum
empty vessel
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उत्तर
Sound waves cannot propagate through vacuum.
(c) Vacuum.
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संबंधित प्रश्न
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A device called oscillator is used to send waves along a stretched string. The string is 20 cm long, and four complete waves fit along its length when the oscillator vibrates 30 times per second. For the waves on the strings.
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