A Helium-Neon Laser Emits Red Light Having a Wavelength of 632.8

question 74

Multiple Choice

A helium-neon laser emits red light having a wavelength of 632.8 nm and a power of 1.85 mW.How many photons are emitted each second? (h = 6.63 × 10−³⁴ J⋅s,c = 3.00 × 10⁸ m/s,and 1 nm = 10−⁹ m)

• A)5.9E+15
• B)3.7E+34
• C)5.9E+24
• D)5.9E+18
• E)​1.2E+17

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Definitions:

Death Instinct

A concept in psychoanalytic theory referring to an innate drive in living beings toward self-destruction or aggression.

Personality

The combination of characteristics or qualities that form an individual's distinctive character, influencing their behaviors, thoughts, motivations, and emotions.

Pleasure Principal

The pleasure principle is a psychoanalytic concept suggesting that the driving force of behavior is the desire to maximize pleasure and avoid pain.

Id

A component of Sigmund Freud's model of the psyche, it represents the instinctual, primal part of the mind that is the source of basic drives and impulses.