The Following Items Are Positioned in Sequence: a Source of a Beam

question 57

Multiple Choice

The following items are positioned in sequence: A source of a beam of natural light of intensity I₀,three ideal polarizers A,B,and C;and an observer.Polarizer axis angles are measured clockwise from the vertical,as viewed by the observer.The axis angle of polarizer A is set at 0° (vertical) ,and the axis angle of polarizer C is set at 50°.The axis angle of polarizer B is set at 120°.What is ratio of the intensity of the beam at the observer to the intensity I₀ of the source?

• A)0.015
• B)0.020
• C)0.025
• D)0.030
• E)0.035

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Definitions:

Psychographics

Used in segmentation; delves into how consumers describe themselves; allows people to describe themselves using those characteristics that help them choose how they occupy their time (behavior) and what underlying psychological reasons determine those choices.

Demographic Changes

Alterations in the statistical characteristics of a population over time, including age, gender, income levels, etc.

Scarce Incomes

The condition where available financial resources are insufficient to meet the needs or wants of individuals or communities.

Psychographic Segmentation

A marketing technique involving division of a market into segments based on consumer personality traits, values, attitudes, interests, or lifestyles.