A Real Object Is 30 Cm from a Lens That

question 11

Multiple Choice

A real object is 30 cm from a lens that has a negative focal length f = -20 cm. The image is

• A) virtual and 30 cm from the lens.
• B) real and 12 cm from the lens.
• C) virtual and 12 cm from the lens.
• D) real and 20 cm from the lens.
• E) None of these is correct.

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Definitions:

Herfindahl Index

A measure of market concentration used to determine the amount of competition among firms within an industry.

Market Shares

The share of sales within an industry attributed to a certain company.

Herfindahl Index

An indicator used to measure the size of firms in relation to the industry and an index of market concentration.

Barriers to Entry

Factors that prevent or hinder new firms from entering an industry, including high startup costs and regulatory restrictions.