Thin Lenses: an Object Is Placed in Front of a Lens

question 34

Multiple Choice

Thin lenses: An object is placed in front of a lens which forms an image of the object.

• A) If the lens is convex, the image cannot be virtual.
• B) If the image is real, then it is also inverted.
• C) If the image is real, then it is also upright.
• D) If the image is virtual, then it is also inverted.
• E) If the image is virtual, the lens must be a diverging lens.

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Definitions:

Hotelling Rule

An economic theory that addresses how the price of non-renewable resources should increase over time under conditions of efficient extraction and market equilibrium.

Marginal Extraction Cost

The additional cost associated with extracting one more unit of a resource.

Treasury Bill

A short-term government security issued at a discount from the par value and pays no interest, maturing in a year or less.

Treasury Bond

Long-term government debt securities with a fixed interest rate and maturity of more than 10 years.