Calculations & Applications (Q-076 to Q-100)

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1.
A laser beam (P = 20 W, area = 10^-6 m^2) has E_0 approximately: -
2.
Stefan-Boltzmann law: a body at 600 K radiates how many times more than at 300 K? -
3.
The photon emission rate of a 100 W source at lambda = 500 nm is approximately: -
4.
The minimum wavelength of X-rays produced by a 50 kV tube is: -
5.
The wavelength of a 2.45 GHz microwave is: -

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