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WINSTONCH [101]
3 years ago
5

How much energy in kJ is associated with a radio wave of wavelength 1.2 X 10^2 m?

Chemistry
1 answer:
eduard3 years ago
6 0
It's very simple.

Energy = \frac{hc}{\lambda}

where, h= Planck's constant = 6.6 x 10^{-34} m^2 kg/s

c= speed of light = 3 x 10^{8} m/s
\lambda = wavelength


So, energy = \frac{6.6 \times 10^{-34} \times 3 \times 10^{8}}{120}

= 1.65 x 10^{-27} J
=1.65 x 10^{-30} KJ

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