Tripling the Focal Length in a Telephoto Lens,while Keeping the Aperture

question 59

Multiple Choice

Tripling the focal length in a telephoto lens,while keeping the aperture size constant,will change the f-number by what factor?

• A)1/9
• B)1/3
• C)3
• D)9

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Definitions:

Functional Alternative

An alternative method or strategy that achieves the same goal or function as the original.

Differential Reinforcement

A technique used in behavior modification that involves reinforcing desired behaviors while withholding reinforcement for undesired behaviors.

DRO Increasing-Interval Schedule

A DRO schedule that thins or fades the reinforcement by gradually increasing the length of the interval. If the specified interval passes without a target response occurring, reinforcement is delivered and the next interval can be increased by a certain amount of time. If the response does occur, however, the next interval stays the same.

Topographically Incompatible

Refers to behaviors that cannot occur simultaneously because the performance of one behavior physically restricts the other.