A Laser with a Power of 1

question 2

Multiple Choice

A laser with a power of 1.0 mW has a beam radius of 1.0 mm.What is the peak value of the electric field in that beam? (c = 3.0 × 10⁸ m/s,μ₀ = 4π × 10^-7 T ∙ m/A, ε₀ = 8.85 × 10^-12 C²/N ∙ m²)

• A)490 V/m
• B)840 V/m
• C)65 V/m
• D)120 V/m
• E)22 V/m

---

Definitions:

Basal Metabolic Rate

How quickly the body burns energy to support fundamental processes like breathing and temperature maintenance while in a state of rest.

Energy Expenditure

The amount of energy a person uses to conduct daily activities and bodily functions.

Unfamiliar Foods

Foods that are not recognized or commonly eaten by an individual, often due to cultural or personal unfamiliarity.

Settling Point

The hypothesis that body weight is regulated at a predetermined, or preferred, level by a feedback control system.