Question

determine the energy for a radio wave in joules.
a 1.989 x 10^{30}
b 1.989 x 10^{-24}
c 1.989 x 10^{24}
d 1.989 x 10^{-30}

Explanation:

Step1: Recall the energy - wavelength formula

The energy of a photon is given by \(E = hc/\lambda\), where \(h = 6.626\times10^{-34}\space J\cdot s\) (Planck's constant), \(c=3\times 10^{8}\space m/s\) (speed of light). For a radio - wave, assume \(\lambda = 10^{2}\space m\) (a typical value for radio waves from the given wavelength scale).

Step2: Substitute the values into the formula

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Answer:

B. \(1.989\times10^{-24}\)