1. The x-ray used by your dentist has a wavelength of 1.5 x 10^ -8 m. What is its frequency?
2. What is the wavelength of the electromagnetic wave transmitted by a device with a frequency of 9.37 x 10 ^2 Hz?
3. Calculate the energy of a photon of radiation with a wavelength of 6.4 x 10 ^-7 m.

(So solution)
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