The term TYPE OF BEAM can be answered with two solutions: LASER (5 letters) and MOON (4 letters). A LASER is a type of beam that is created by stimulating a material with an external energy source, such as electricity. Lasers are used in many applications, such as cutting, welding, and medical treatments. The MOON is also a type of beam, but it is not created by an external energy source. Instead, the MOON's light is reflected from the sun.