Calculate the frequency of an electromagnetic wave (in air) having lambda = 5 mm

Question

Calculate the frequency of an electromagnetic wave (in air) having lambda = 5 mm Calculate the wave length of a sound wave having T = 0.015 s Calculate the absolute pressure in a Fresh water lake at a depth of 7.0 m Calculate the natural angular frequency of a simple pendulum of mass 3.0 kg and length of 2.0 m Calculate the oscilation period for a 3.0 kg mass to a string having spring constant K = 16 N/m Calculate the sound level, in for a loudspeaker producing sound waves with an intensity of 0.01 w/m^2

Explanation / Answer

here,

1)

wavelength , lamda = 5 mm

lamda = 0.005 m

speed of EM wave , c = 3 * 10^8 m/s

the frequency , f = c/lamda

f = 3 * 10^8 /0.005 hz

f = 6 * 10^10 Hz

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