One is the visible spectrum, as mentioned above, and the other is the radio spectrum. However, not all of the radio spectrum is useable for space communication. The available window spans from about 30 MHz to 30 GHz, although these are not absolute end frequencies.
Isaiah 43:2 (BBE) When you go through the waters, I will be with you; and through the rivers, they will not go over you: when you go through the fire, you will not be burned; and the flame will have no power over you.saiah 43:2 (CJB) When you pass through water, I will be with you; when you pass through rivers, they will not overwhelm you; when you walk through fire, you will not be scorched-the flame will not burn you.
I'll be the one to tuck you in at night. And if you want to leave. I can guarantee. You won't find nobody else like me. You don't know how you met me. You don't know why, you cant turn around and say good-bye. All you know is when im with you I make you free. And swim through your veins like a fish in the sea.