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What type of laser is an NG YAG LASER?

  1. Gas laser

  2. Dye laser

  3. Solid state laser

  4. Liquid laser

The correct answer is: Solid state laser

An NG YAG (neodymium-doped yttrium aluminum garnet) LASER is a solid state laser, meaning it uses a solid medium as the active laser medium rather than a gas, liquid, or dye. Option A is incorrect because gas lasers use a gas as the active medium. Option B is incorrect because dye lasers use organic dyes as the active medium. Option D is incorrect because liquid lasers use liquid as the active medium. Therefore, the correct option is C, solid state laser. This type of laser is commonly used for industrial, medical, and scientific applications due to its high power output and efficiency.