A Short Guide to Infrared
Many electronic circuits will be able to detect invisible light, which is often called infrared. An infrared light is defined as a light that has a frequency of between 1THz and 400 THz. Its spectrum sits between microwaves and visible lights. With infrared, the lower the frequency the higher the wavelength. This is known as an inverse relationship. Waves are between 0.75 and 300 micrometres – any shorter and the waves would become visible light. Infrared light can be very handy…