Photons in a Laser Beam Have the Same Energy, Wavelength

question 70

Multiple Choice

Photons in a laser beam have the same energy, wavelength, polarization direction, and phase because:

• A)each is produced in an emission that is stimulated by another
• B)all come from the same atom
• C)the lasing material has only two quantum states
• D)all photons are alike, no matter what their source
• E)none of the above

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