This concept has been distorted
F-117 Nighthawk, first aircraft declared “stealth”.
Stealth does not mean being invisible. Stealth means being discreet. “Stealth” planes have the ability to disappear from radar as quickly as they appear. They have the entire fuselage cut out to disperse the radar waves, the black color absorbs the aforementioned waves and on top of that camouflages it at night, even if you notice, most of the missions are night for that reason. Also, in the paint, there is a stealthy coating material that absorbs radar waves even more. It is this same material that is disintegrated if the F-35 Lightning II fighter dare to make a supersonic flight for more than 5 minutes. These components are allergic to moisture: it’s not for nothing that the F-117 can’t get rain and a B-2 crashed in Guam.
See that yellow ball on the tip of the right (and also left) wing of the B-2?
It is she who makes him “invisible” and “not invisible”. This “ball”, in fact, is a retractable plate, which the pilot presses a button where he raises it and appears on the radar and lowers, disappearing. What helps a lot about the B-2 is that it has the shape of a bird of prey in flight, which greatly reduces drag and radar detection. B-2 and F-22 have the cockpit with a gold layer, which also helps with the reduction of detection.
But, as every weapon has its countermeasures, there is no point in spending billions of dollars to be invisible to radar if you are not invisible to heat. The missiles are guided by heat…so if the fighters happen to be on patrol and observe this aircraft in the air, the missiles can destroy it.