A Radiometer Has Two Square Vanes (Each Measuring 1

question 47

Multiple Choice

A radiometer has two square vanes (each measuring 1.0 cm by 1.0 cm) ,attached to a light horizontal cross arm,and pivoted about a vertical axis through the center,as shown in the figure.The center of each vane is 6.0 cm from the axis.One vane is silvered and it reflects all radiant energy incident upon it.The other vane is blackened and it absorbs all incident radiant energy.An electromagnetic wave with an intensity of 0.30 kW/m² is incident normally upon the vanes.What is the electromagnetic power absorbed by the blackened vane? (c = 3.00 × 10⁸ m/s, μ₀ = 4π × 10^-7 T ∙ m/A,ε₀ = 8.85 × 10^-12 C²/N ∙ m²)

• A)0.030 W
• B)0.040 W
• C)0.050 W
• D)0.060 W
• E)0.090 W

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Definitions:

Competitive Labor Market

A market where numerous buyers (employers) and sellers (workers) exist, leading to wages derived from supply and demand conditions.

Marginal Product

The additional output that is generated by employing one more unit of a particular input.

Marginal Productivity Theory

An economic theory that posits that wages are determined by the marginal productivity of the laborer to the employer’s production.

Wage Disparities

The differences in wages or salaries between individuals or groups due to various factors such as occupation, experience, gender, or age.