A Collection of Atoms Has 20% of the Sample in a State

question 8

Multiple Choice

A collection of atoms has 20% of the sample in a state 5.9 eV above the ground state. If these emit coherent radiation, what is the wavelength of the laser light produced? (c = 3.00 × 10⁸ m/s, h = 6.626 × 10^-34 J ∙ s, 1 eV = 1.60 × 10^-19 J)

• A) 210 nm
• B) 91 nm
• C) 340 nm
• D) 34 nm

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Definitions:

Voluntary

Referring to actions or movements under conscious control by the individual.

Anterior Roots

The front part of a spinal nerve that carries motor output from the spinal cord to the body's muscles.

Spinal Nerves

Nerves that emerge from the spinal cord and branch out to innervate different parts of the body.

Motor Neurons

Neurons that carry signals from the spinal cord or brain to effectors (muscles or glands) to trigger movement or action.