A Camera Has a Lens of Focal Length 50 Mm

question 38

Multiple Choice

A camera has a lens of focal length 50 mm and a speed of f/2.0.What is the diameter of the lens?

• A) 12.5 mm
• B) 25.0 mm
• C) 50 mm
• D) 100 mm
• E) ​2.0 mm

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Definitions:

Output Price

The price at which a product or service is sold in the market.

Monopolist

A single seller in a market with no close substitutes for the product, giving the seller market power.

Marginal Revenue Product

The increase in revenue a firm expects from employing one additional unit of a resource, such as labor.

Labor Demand Curve

A graph showing the relationship between the quantity of labor demanded by employers and the wage rate, typically illustrating that higher wages lead to lower demand for labor.