The Wavelength of a Ruby Laser Is 694

question 17

Multiple Choice

The wavelength of a ruby laser is 694.3 nm. What is the energy difference between the two energy states involved in laser action?

• A)1.537 eV
• B)1.646 eV
• C)1.786 eV
• D)1.812 eV
• E)3.572 eV

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The difference between a country's purchases of foreign assets and foreign purchases of its assets over a given period.

U.K.

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