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2 cards from this section. Quick, good the night before a test.
What gases are used in a He-Ne laser?
Think of what the name suggests.
What color light does a He-Ne laser emit?
Consider the wavelength mentioned.
What gas primarily excites neon atoms in a He-Ne laser?
Consider the name of the laser.
Is the light emitted by a He-Ne laser coherent?
Recall the features of laser light.
If a He-Ne laser operates at 632.8 nm, what is the energy of a single photon emitted by this laser? Use the formula E = hc/λ.
Use the given constants for Planck's constant and speed of light.
Explain why population inversion is typically unnatural and how it is achieved in the He-Ne laser.
Consider the role of energy input in achieving this state.
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