Indicate Which of the Following Sources Produces the Highest Energy

Multiple Choice

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