A show that the intensity i the energy crossing unit

Reference no: EM13612593

(a) Show that the intensity I (the energy crossing unit areaper unit time) is the product of the energy per unit volume u and the speed of propagation v of the wave disturbance.

(b) Raio waves travel at a speed of 3.0x10^8m/s. Find the energy desity in a radio wave 480km from a 50000-wsource,assuming the waves to be spherical and the propagation to be isotopic

Reference no: EM13612593

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