MCQ
A tuning fork sends sound waves in air. If the temperature of the air increases, which of the following parameters will change?
- ADisplacement amplitude.
- BFrequency.
- ✓Wavelength.
- DTime period.
✓
Answer
Correct option: C.
Wavelength.
The velocity of a sound wave varies with temperature as follows:
$\text{v}\propto\sqrt{\text{T}}$
As the temperature increases, the speed also increases. However, since the frequency remains the same, its wavelength changes.
$\text{v}\propto\sqrt{\text{T}}$
As the temperature increases, the speed also increases. However, since the frequency remains the same, its wavelength changes.
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