A Ray of Light Strikes a Plane Mirror Perpendicular to the Mirror

question 18

Multiple Choice

A ray of light strikes a plane mirror perpendicular to the mirror. What is the angle of incidence?

• A) 360°
• B) 0°
• C) 180°
• D) 90°
• E) 270°

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Definitions:

Complete Counterbalancing

An experimental design technique where all possible orders of presenting stimuli are used to control for order effects.

Matched Pairs Design

A method of assigning subjects to groups in which pairs of subjects are first matched on some characteristic and then individually assigned randomly to groups.

Matching Variable

A characteristic used to ensure that members of different groups in a study are similar on that particular attribute.

Dependent Variable

The variable in an experiment that is observed and measured, expected to change as a result of alterations to the independent variable.