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question mark

A radio transmitter operates at a frequency 880 kHz and a power of 10 kW. The number of photons emitted per second is

(a) 1.72 × 1031

(b) 1.327 × 1025

(c) 1.327 × 1037

(d) 1.327 × 1045

Hrishant Goswami , 12 Years ago
Grade 10
anser 3 Answers
Hrishant Goswami

(a)

        No. of photons emitted per sec,

Last Activity: 12 Years ago
Mubashara Khan
one kw is the power or energy per unit time 
1000j/s is the power (given that power = 10kw then 10kw =10000j/s)
we know that 
                  E=hf       
 where E= energy of a single photon 
            h= planck,s constant 
            f= frequency of the photon
now simplify equation as power = energy/sec
suppose n photons are emitted per second then we can say that 
power=nhf  
n=power/hf
n=10000/6.6 x 10-34 x880 x103
n=1.72 x 1031 
                             
Last Activity: 6 Years ago
ankit singh
Electromagnetic Waves. A radio transmitter operates at a frequency of 880 kHz, and a power of 10 kW. Find the number of photons per second emitted. Suppose that the electric field amplitude of an electromagnetic wave is E0 = 120 N/C and that its frequency is v = 50.0 MHz.
Last Activity: 5 Years ago
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