A 24 X $10^{14}$ Hz Laser Emits a 3 $0.65 \mathrm {~J} / \mathrm { m } ^ { 3 }$

question 16

Multiple Choice

A 2.4 x $10^{14}$ Hz laser emits a 3.5-μs pulse that is 5.0 mm in diameter.The average energy density in the beam is $0.65 \mathrm {~J} / \mathrm { m } ^ { 3 }$ What average power is emitted by this laser? (c = 3.0 × 10⁸ m/s,μ₀ = 4π × 10^-7 T ∙ m/A,ε₀ = 8.85 × 10^-12 C²/N ∙ m²)

• A)3.8 kW
• B)7.7 kW
• C)12 kW
• D)15 kW
• E)19 kW

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Definitions:

Absolute Threshold

The minimum intensity of a stimulus that one can detect at least 50% of the time, which varies from one individual to another and for different senses.

Reliable Detection

The ability to consistently and accurately identify or recognize the presence of a specific condition, substance, or pattern.

Rare Condition

A health condition or disease that affects a small percentage of the population, often with limited research and treatment options.

Warning Signals

Indicators or alerts that signify potential danger or the need for caution.