\magnification=\magstep1


$$
E \quad = \quad h \nu \quad = \quad {{hc}\over{\lambda}}
$$

$$
<S> \quad = \quad {{c}\over{8 \pi}} E_o B_o  
          = \quad {{1}\over{2 \mu_o}} E_o B_o
$$

$$
F_{\rm rad} \quad = \quad {{<S> A}\over{c}} \cos(\theta)
$$

$$
F_{\rm rad} \quad = \quad {2{<S> A}\over{c}} \cos^2(\theta)
$$

$$
p \quad = \quad {{E}\over{c}} \quad = \quad {{hc/\lambda}\over{c}} \quad
        = \quad {{h}\over{\lambda}}
$$

$$
F_{\rm rad} \quad = \quad {{N}\over{t}} p \quad 
                  = \quad {{N h}\over{\lambda t}}   \qquad {\rm (absorbed)}
$$

$$
F_{\rm rad} \quad = \quad {{2 N}\over{t}} p \quad 
                  = \quad {{2 N h}\over{\lambda t}}   \qquad {\rm (reflected)}
$$


$$
{\rm Power} \quad = \quad \sigma T^4 \thinspace A
$$

$$
B_{\lambda} (T) \quad = \quad {{ 2 h c^2 / \lambda^5 }
                          \over{e^{hc/\lambda k T} - 1} }
$$

$$
B_{\nu} (T) \quad = \quad {{ 2 h \nu^3 / c^2 }\over{e^{h \nu/kT} - 1 } }
$$

$$
\lambda_{\rm peak} \quad = \quad {{0.0029 \ {\rm m }}\over{T}} \ \ {\rm Kelvin}
$$
    


\bye
