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//variable declaration
C=3*10**8 //Velocity of light
W=632.8*10**-9 //wavelength
P=2.3
t=1
h=6.626*10**-34 //Planck constant
S=1*10**-6
//Calculations
V=C/W //Frequency
n=((P*10**-3)*t)/(h*V) //no.of photons emitted
PD=P*10**-3/S //Power density
//Result
printf('Frequency= %0.3f *10**14 Hz \n',(V/10**14))
printf('no.of photons emitted= %0.3f *10**15 photons/sec \n',(n/10**15))
printf('Power density = %0.3f kWm**-2 \n',(PD/1000))
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