True or False) The ionosphere layer of Earth's atmosphere reflects radio waves back to Earth?

Please answer quickly. Thank you!!!True or False) The ionosphere layer of Earth's atmosphere reflects radio waves back to Earth?
True. It reflects radio waves up to 50 MHz. This frequency changes depending if it's day or night and solar activity. I've heard of times that frequencies up to 140 MHz have been reflected back.True or False) The ionosphere layer of Earth's atmosphere reflects radio waves back to Earth?
Longer waves, and at night.