Which one among the following lasers is used in cancer treatment?1. He

1.	Which one among the following lasers is used in cancer treatment?1. He - Ne laser2. Ruby laser3. CO2 laser4. Semiconductor laser
Answer» Correct Answer - Option 3 : CO₂ laser The correct answer is CO₂ Laser Carbon dioxide (CO₂): CO₂ lasers removes very thin layer of tissue from the surface of the skin without removing deeper layers. The CO₂ laser may be used to remove skin cancers and some precancerous cells. Helium-neon (He–Ne) lasers are a frequently used type of continuously operating gas lasers, which is also the first demonstrated gas laser Ruby laser is a solid-state laser that uses the synthetic ruby crystal as its laser medium. Ruby laser is the first successful laser developed by Maiman in 1960. Ruby laser is one of the few solid-state lasers that produce visible light. Semiconductor laser (LD): It is a device that causes laser oscillation by flowing an electric current to the semiconductor. The mechanism of light emission is the same as a light-emitting diode (LED).

Which one among the following lasers is used in cancer treatment?1. He - Ne laser2. Ruby laser3. CO2 laser4. Semiconductor laser

Answer» Correct Answer - Option 3 : CO₂ laser

The correct answer is CO₂ Laser

Carbon dioxide (CO₂): CO₂ lasers removes very thin layer of tissue from the surface of the skin without removing deeper layers.
- The CO₂ laser may be used to remove skin cancers and some precancerous cells.

Helium-neon (He–Ne) lasers are a frequently used type of continuously operating gas lasers, which is also the first demonstrated gas laser
Ruby laser is a solid-state laser that uses the synthetic ruby crystal as its laser medium.
- Ruby laser is the first successful laser developed by Maiman in 1960.
- Ruby laser is one of the few solid-state lasers that produce visible light.
Semiconductor laser (LD): It is a device that causes laser oscillation by flowing an electric current to the semiconductor.
- The mechanism of light emission is the same as a light-emitting diode (LED).