Recently, an extremely strong solar flare sent X-rays toward Earth that disrupted Earth's ionosphere. Radio waves leaving a transmitter on Earth's surface reflect off of Earth's ionosphere, and can be redirected downward such that transmission over long distances beyond the line of sight to the transmitter is possilble. As a result of the flare, transmission from a 24 kHz station in New England received here in Louisville was disrupted. You can see the effect in the graph of the signal received versus time. The smooth part of the graph is during daylight, and the erratic part is during the night. The flares occured during daytime along the path to the transmitter. There was one at about 21h Universal Time, and another stronger one at 22:30. In Louisville, 22h UT is 5 PM EST. Minight was about 7h UT, dawn about 12h, and sunset about 23h. What is the wavelength of this radio signal? Hint: the units "kHz" are kilohertz, 1000 cycles per second. A typical AM broadcast signal range is from 540 kHz to 1700 kHz, while FM is from 88 to 108 MHz (megahertz)