An 80-MW Laser Beam Emits a Cylindrical Beam of Single-Wavelength Sinusoidal

question 58

Multiple Choice

An 8.0-mW laser beam emits a cylindrical beam of single-wavelength sinusoidal light $0.90 \mathrm {~mm}$ in diameter. What is the rms value of the electric field in this laser beam? $\left( \varepsilon _ { 0 } = 8.85 \times 10 ^ { - 12 } \mathrm { C } ^ { 2 } / \mathrm { N } \right.$ . $\left. \mathrm { m } ^ { 2 } , \mu _ { 0 } = 4 \pi \times 10 ^ { - 7 } \mathrm {~T} \cdot \mathrm { m } / \mathrm { A } , c = 3.0 \times 10 ^ { 8 } \mathrm {~m} / \mathrm { s } \right)$

• A) \(1100 \mathrm {~N} / \mathrm { C }\)
• B) \(2000 \mathrm {~N} / \mathrm { C }\)
• C) \(2200 \mathrm {~N} / \mathrm { C }\)
• D) \(1000 \mathrm {~N} / \mathrm { C }\)
• E) \(4100 \mathrm {~N} / \mathrm { C }\)

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Definitions:

Schema

A cognitive framework or concept that helps organize and interpret information, based on experience, to make sense of the world.

Assimilation

The cognitive process of fitting new information into pre-existing cognitive schemas, perceptions, and understanding.

Circular Reaction

A repetitive action that achieves a desired outcome, often seen in the developmental stages of infants as they learn to interact with their environment.

Cognitive Schema

A mental structure that represents some aspect of the world, organizing categories of information and the relationships among them, aiding in understanding and predicting the world.