When I(v)dv is the intensity of light emitted from an area
unit of the radiating body In the frequencies range
(v,v+dv)
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1. Show that the expression of the wave power as a function
of the wavelength is:
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when:
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2. Prove Wayne's law and express the Wayne constant using
nature constants only. hint, use :
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3. Prove Stefan Boltzmann's Law. Express the Stefan Boltzmann
constant using nature constants only.
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4. Showed that at low frequencies the Planck formula merges
with the formula of Riley and Jeans according to it:
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2π 27 hy 1(v) = ce c²hvikat 1 ev/ -1
J kg = 1.38-10-23 °K
2πο? I(2)= 2 1 h h helikt e
Radi
x hc х x= kᎢ T
hv (x= KT הדרכה: השתמש בהצבה rdx e" -1 15 0
21k Tv2 I(v) = c?
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