A Physics Student Desires to Create a Beam of Light

question 76

Multiple Choice

A physics student desires to create a beam of light that consists of parallel rays.Which one of the following arrangements would allow her to accomplish this task?

• A)A light bulb is placed at the focal point of a convex mirror.
• B)A light bulb is placed at the focal point of a diverging lens.
• C)A light bulb is placed at the focal point of a converging lens.
• D)A light bulb is located at twice the focal length from a concave mirror.
• E)A light bulb is located at twice the focal length from a converging lens.

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Definitions:

Open-Market Operations

Activities undertaken by central banks to buy or sell government securities in the open market to influence the money supply and interest rates.

Aggregate Demand

The all-embracing pursuit of goods and services in an economy, calculated at a fixed overall price level and within a chosen time frame.

Business Cycle Trough

The phase in the business cycle where economic activity is at its lowest point, preceding a recovery or expansion period.

Purchasing Power

The financial ability to buy goods and services; it reflects the value of money in terms of the quantity of goods or services that one unit of money can buy.