Two Thin Lenses in Combination Are Placed in Contact with Each

question 39

Multiple Choice

Two thin lenses in combination are placed in contact with each other along a common axis.They have powers of 70 and -20 diopters,respectively.What is their combined power?

• A)25 diopters
• B)50 diopters
• C)90 diopters
• D)-25 diopters
• E)​70 diopters

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Definitions:

Social Phenomena

Behaviors, patterns, or events that influence or are influenced by individuals within a society.

Cognitive Dissonance

A mental discomfort experienced by an individual who holds two or more contradictory beliefs, ideas, or values at the same time.

Rationalize

The act of justifying behaviors or decisions with logical reasons, often after the fact, to make an action or belief appear more acceptable.

Mere Exposure Effect

A mental effect in which individuals grow more affectionate or preferential towards elements simply due to their familiarity.