What Is the Purkinje Shift

question 20

Multiple Choice

What is the Purkinje shift?

• A)the observation that photopic vision is less sensitive to color than scotopic vision
• B)the observation that long wavelength light excites the L-cone more than short-wavelength light does
• C)the observation that short wavelengths tend to be relatively brighter than long wavelengths in scotopic vision compared to photopic vision
• D)the observation that people with color deficiencies shift to greater dependence on scotopic at higher light levels than people with normal color vision

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Definitions:

Aggregate-Supply Curve

A curve that shows the quantity of goods and services that firms choose to produce and sell at each price level

Trade-Off

An exchange where getting something of value requires giving up something else of value, typically used in the context of making decisions with limited resources.

Short Run

A period during which at least one of a firm's inputs is fixed and cannot be changed.

Fed's Policy

The set of monetary policy guidelines and actions taken by the Federal Reserve, the central banking system of the United States, to control the money supply and achieve macroeconomic goals.