Question

If the time period of a sound wave is 1 ms [thousand of a second], then find(i) frequency(ii) wavelength(iii) speed of sound

Answer 1

Answer:

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Answer 2

Answer:

(i) frequency = 10³ Hz

(ii) wavelength = 0.34 m.

(iii) speed of sound = 340 m/s [through solid medium]

Step-by-step explanation:

The time period of sound wave is given, T = 1 ms = 1 × $10^{-3}$ s.

(i) Frequency: Frequency indicates number of vibrations of the particles. Its SI unit is hertz (Hz).

Formula: Frequency = $\frac{1}{time period}$ = $\frac{1}{10^{-3}}$ = 10³ Hz

(iii) Speed: Speed means how fast or how slow the particles in the sound wave are moving. Its SI unit is m/s.

The speed of sound through solid medium is 340 m/s.

(ii) Wavelength: Wavelength is a distance between two identical points of two successive waves. The SI unit of wavelength is m.

Formula: wavelength = $\frac{speed}{frequency}$ = $\frac{340}{10^3}$ = 0.34 m.

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