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What colours can helium-neon lasers emit?
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laser
Basic laser components.
Helium-neon lasers are most commonly known for emitting red light. However, these gas lasers can also be configured to emit light in the following colours and spectrums:
- Yellow
- Orange
- Green
- Infrared1
In these devices, helium atoms transfer energy to neon atoms, which then produce the stimulated emission of light.1