Where Must an Object Be Placed in Front of a Concave

question 61

Multiple Choice

Where must an object be placed in front of a concave mirror so that the image and object are the same size (F is the focal point and C is the center of curvature) ?

• A)at F
• B)at C
• C)between F and C
• D)beyond C
• E)between F and the mirror

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The extent to which a test successfully measures an operational variable and can predict a criterion or outcome.

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The extent to which a test, measurement, or research accurately reflects or assesses the specific concept it is intended to measure.

Job Performance

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Validity

The accuracy with which a test or measurement assesses what it intends to measure.