Lasers: the Wavelength of a Ruby Laser Is 694

question 19

Multiple Choice

Lasers: The wavelength of a ruby laser is 694.3 nm. What is the energy difference between the two energy states involved in laser action? (c = 2.9979 × 10⁸ m/s, h = 6.626 × 10^-34 J ∙ s, 1 eV = 1.6022 × 10^-19 J)

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

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Definitions:

Default

A keyword in programming used to specify the default case in a switch statement or default values for functions and methods.

Terminate

The action of ending or stopping a process, program, or operation in computing.

Break

A statement used to exit from a loop or switch statement before it has finished executing.

Defensive Programming

A programming approach aimed at reducing bugs and problems by anticipating potential issues and systematically handling them throughout the code.