Indicate which of the following sources produces the highest energy photons. A)a radio station with   106.7 MHz B)a dentist's X-ray source with   100 pm C)the laser in a CD player with   650 nm D)a microwave oven with   6.0  10¹⁰ Hz E)your cell phone with   1.750 GHz

Question

Quizplus · Accepted Answer

The dentist's X-ray source produces electromagnetic radiation with a wavelength of 100 pm, which corresponds to high-energy photons. Photons with higher frequency (or shorter wavelength) have higher energy, according to the relationship E=hf, where E is energy, h is Planck's constant, and f is frequency. The other sources listed have longer wavelengths (and therefore lower frequencies), and therefore lower energy photons.

Indicate Which of the Following Sources Produces the Highest Energy