If they hit your skin, then they definitely always do.
infared rays - 92 % positive
Many light frequencies give off heat. Infrared is one of those frequencies.
Infrared waves warm you providing heat and visible waves enable you to see.
The energy you feel as heat from an electric burner is infrared radiation, which is a form of electromagnetic waves. When the burner heats up, it emits infrared radiation that is absorbed by nearby objects, including your skin, causing them to warm up.
Infrared Waves
Any wave can convert to heat energy if it is absorbed. The warmth you feel from the Sun, if that's what you mean, is due to visible light and infrared - both of which are electromagnetic waves.
Infrared radiation is the electromagnetic wave that makes your skin feel warm. It has longer wavelengths than visible light and can penetrate the skin's surface, causing it to heat up.
infrared
Infrared radiation is the type of electromagnetic wave that makes an object feel warmer. These waves are produced by the heat emitted from objects and are detected by our skin as warmth.
Warm objects emit infrared waves, which are a type of electromagnetic radiation. These waves are not visible to the human eye but can be felt as heat.
Two examples of infrared waves are heat radiation emitted by a fire and the heat you feel from the sun on your skin.
infrared waves