What does the acronym LASER stand for?

• A. Light Amplification of Standard Emission of Radiation
• B. Light Amplification of Stimulated Emission of Radiation
• C. Laser Applied Standard Emission of Radiation
• D. Light Amplification from Excited Radiation

Answer: (B)

The acronym LASER stands for Light Amplification of Stimulated Emission of Radiation. This definition accurately describes the fundamental principles behind how lasers function.

The process begins with the amplification of light, which occurs when photons are emitted due to stimulated emission. In a laser, atoms are energized (or excited) and, when they return to a lower energy state, they release photons. This emitted light is then amplified within the laser medium, resulting in a coherent beam of light that can be precisely focused.

Understanding this concept is crucial, especially in the context of speed measurement devices, as lasers are commonly utilized for accurately measuring distances and speeds due to their precision and ability to maintain beam coherence over long distances.