Radio waves and infrared radiation are part of the electromagnetic spectrum, which encompasses a wide range of wavelengths and frequencies. Radio waves have longer wavelengths and lower frequencies than infrared radiation. Infrared radiation typically ranges from about 700 nanometers to 1 millimeter in wavelength, while radio waves can have wavelengths ranging from millimeters to meters or even longer.\n\nIf you're asking whether we can detect electromagnetic radiation with wavelengths longer than infrared (i.e., longer than 1 millimeter), then the answer is yes, we can. These longer-wavelength electromagnetic waves are often referred to as microwaves and radio waves.\n\nRadio telescopes are used to detect and study radio waves from various astronomical objects, such as stars, galaxies, and cosmic microwave background radiation, which has much longer wavelengths than infrared radiation. Some of the longest radio waves used in astronomy have wavelengths measured in meters.\n\nSo, in summary, we can detect electromagnetic radiation with wavelengths beyond infrared, including radio waves and microwaves, using specialized instruments like radio telescopes. These longer-wavelength waves provide valuable information about the universe and are routinely observed in astronomy.
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