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A point isotropic source emits a luminou...

A point isotropic source emits a luminous flux `Phi = 10 1m` with wavelength `lambda = 0.59 mu m`. Find the peak strength values of electric and magentic fields in the luminous flux at a distance `r = 1.0 m` from the osurce. Make use of the curve illustrated in Fig.

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We have `Phi_(e) = (Phi A)/(V (lambda))`
But `underset("mean energy flux vector")underset (darr) ul(Phi_(e)=1/2sqrt(epsilon_(0)/(mu_(0))))E_(m)^(2)xx(4pir^(2))/("area")` or `E_(m)^(2) = (PhiA)/(2pir^(2) V(lambda)) sqrt((mu_(0))/(epsilon_(0)))`
For `lambda = 0.59 mu m V (lambda) = 0.74` Thus
`E_(m) = 1.14 V//m`
Also `H_(m) = sqrt((epsilon_(0))/(mu_(0))) E_(m) = 3.01mA//m`
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