Question

determine the energy for a microwave in joules.
a 1.989 x 10^25
b 1.989 x 10^-25
c 1.989 x 10^-29
d 1.989 x 10^29

Explanation:

Step1: Recall the energy - wavelength formula

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

Step2: Substitute the values into the formula

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Answer:

B. \(1.989\times10^{-25}\)