a transverse wave of frequency 20 hz has 10 crests in 20 cm find wave length and wave velocity
Answers
Answer:wavelengthis 1 cm and speed is 0.2m s
Explanation:
Answer:
The wavelength of the wave is 0.02 m, and the wave velocity of the wave is 0.4 m/s.
Explanation:
Given that,
Frequency of a traverse wave = 20 Hz
Number of crests = 10 in 20 cm
Wavelength is nothing but the distance between the two consecutive crests.
1 crest + 1 trough is equal to 1 wavelength.
There are 10 crests in 20 cm. So there will be 10 wavelengths in 20 cm
Wavelength of the wave = 20 cm / 10
= 2 cm
= 0.02 m
As we know,
Wave velocity of the wave = Wavelength of the wave × Frequency of the wave
= 2 cm × 20 Hz
= 40 cm/s
= 0.4 m/s
Therefore, the wavelength of the wave is 0.02 m, and the wave velocity of the wave is 0.4 m/s.
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