Use the worked example above to help you solve this problem. A wave has a wavele

Question

Use the worked example above to help you solve this problem. A wave has a wavelength of 3.50 m. Calculate the frequency of the wave If it is each of the following types of waves. Take the speed of sound as 343 m/s and the speed of light as 3.00 times 10^8 m/s. (a) a sound wave (b) a light wave (a) Find the wavelength of an electromagnetic wave with frequency 8.5 GHz = 8.50 times 10^9 Hz (G = giga = 10^9), which is in the microwave range. (b) Find the speed of a sound wave in an unknown fluid medium if a frequency of 562 Hz has a wavelength of 2.65 m.

Explanation / Answer

here,

wavelength , lamda = 3.5 m

a)

for sound wave

speed , v = 343 m/s

the frequency , f = v/lamda

f = 343 /3.5 Hz

f = 98 Hz

the frequency is 98 Hz

b)

for light wave

speed , v = 3 * 10^8 m/s

the frequency , f = v/lamda

f = 3 * 10^8 /3.5 Hz

f = 8.57 * 10^7 Hz

the frequency is 8.57 * 10^7 Hz

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