Camera: the Focal Length of a Thin Lens Is 40

question 82

Multiple Choice

Camera: The focal length of a thin lens is 40 mm and its aperture diameter is 10 mm. What is the f-number of this lens?

• A) f/4.0
• B) f/2.0
• C) f/5.6
• D) f/0.30
• E) f/0.40

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Definitions:

First-mover Advantage

The competitive advantage gained by the initial ("first-moving") significant occupant of a market segment.

Bertrand Duopoly

A market structure in which two companies compete on price, each setting their price independently with the aim of maximizing profit, assuming the competitor's price is fixed.

Homogenous Products

Goods that are identical in features and quality, making them indistinguishable to consumers from those offered by competing suppliers.

Bertrand Duopoly

A Bertrand duopoly is a market structure in which two firms set prices competitively for homogeneous goods or services, with the lower-priced firm capturing the entire market.