Q2 of 16 Page 22

Fill in the blanks with suitable words :

The SI unit of wavelength is ____________ .

The SI unit of wavelength is metre .

Explanation: Wavelength refers to the distance between two consecutive crests or two consecutive troughs. As it is a distance hence measured in metres.


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1

The factor that is transmitted in wave motion is,

 2

Fill in the blanks with suitable words :

The product of frequency and wavelength of a sound wave is equal to its ___________ .

 2

Fill in the blanks with suitable words :

The velocity of sound in air at 25 °C is approximately ________.

 3

Answer the following:

Why is sound a longitudinal wave?