The Wavelength of a Ruby Laser Is 694

question 26

Multiple Choice

The wavelength of a ruby laser is 694.3 nm.What is the energy difference between the two energy states for the transition that produces this light? (c = 3.00 × 10⁸ m/s,1 eV = 1.60 × 10^-19 J,h = 6.626 × 10^-34 J ∙ s)

• A)1.54 eV
• B)1.65 eV
• C)1.79 eV
• D)1.81 eV

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Definitions:

Pinna

The visible part of the ear that is outside the head, which captures sound waves and directs them into the ear canal.

Middle Ear

The part of the ear that channels and amplifies sound through the eardrum, hammer, anvil, and stirrup to the inner ear.

Eardrum

A slim barrier that divides the external ear from the internal ear and oscillates when influenced by sound vibrations.

Middle Ear

The part of the ear that contains three small bones (the hammer, anvil, and stirrup) that transmit sound vibrations from the eardrum to the inner ear.