In a Scene from a Movie,a Nearsighted Character Removes His

question 37

Multiple Choice

In a scene from a movie,a nearsighted character removes his eyeglasses and uses them to focus the nearly parallel rays of the sun to start a fire.What is physically wrong with this scene?

• A)The eyeglasses have diverging lenses and cannot be used to focus parallel rays.
• B)The eyeglasses have converging lenses and cannot be used to focus parallel rays.
• C)Sunlight cannot be used to start a fire.
• D)A fire can only be started if the image is virtual.
• E)Parallel rays cannot be focused.

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Definitions:

Nonrival

A characteristic of a good whereby one person's consumption does not reduce its availability to others.

Nonexcludable

A characteristic of a good or service that prevents the owner or provider from excluding individuals from using it once it has been provided.

Marginal Private Benefit

The additional benefit received by a consumer or producer from consuming or producing one more unit of a good or service.

Marginal Social Cost

The total cost to society of producing an additional unit of a good, including both the private costs borne by the producer and any external costs inflicted on others.