Light Intensity (I) Can Be Described as the Power Emitted $\pi$

question 84

Multiple Choice

Light intensity (I) can be described as the power emitted by a light source (P) over a given area in meters squared) .Suppose a 100 W mercury vapor lamp emits 365.4 nm photons equally in all directions.At a distance of 1.450 m, how many photons hit per square meter per second?
(1 W = 1 J/s; I = P/Area = P/4 $\pi$ d ² , where d is the distance.)

• A)5 * 10⁷ photons
• B)7 * 10⁹ photons
• C)9 * 10¹⁶ photons
• D)7 * 10¹⁸ photons
• E)6 * 10¹⁹ photons

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Definitions:

Conformity Pressures

The influence exerted by a group that encourages individuals to change their attitudes, values, or behaviors to align with group norms.

Asch

Refers to Solomon Asch, known for his research on conformity, specifically the experiments demonstrating the influence of group pressure on opinions.

Crutchfield Situation

A technique used in social psychology experiments to study conformity, where individuals must make judgments while being exposed to the presumed opinions of others.

Asch Situation

An experiment by Solomon Asch that demonstrated the power of conformity in groups, where individuals often agree with a consensus even if it is clearly incorrect.