A Metallic Surface Is Illuminated with Light of Wavelength $400 \mathrm {~nm}$

question 25

Short Answer

A metallic surface is illuminated with light of wavelength $400 \mathrm {~nm}$ . If the work function for this metal is $2.40 \mathrm { eV }$ , what is the maximum kinetic energy of the ejected electrons, in electron-volts? $\left( 1 \mathrm { eV } = 1.60 \times 10 ^ { - 19 } \mathrm {~J} , c = 3.00 \times 10 ^ { 8 } \mathrm {~m} / \mathrm { s } , h = 6.626 \times 10 ^ { - 34 } \mathrm {~J} \cdot \mathrm { s } \right)$

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Definitions:

Argument from Analogy

A form of reasoning in which a similarity between two or more things is used to suggest that what is true of one thing must also be true of the others, especially in cases lacking direct evidence.

Other Minds

The philosophical problem concerning the nature of understanding or knowing the existence of and thoughts or feelings of others.

Self-identity

An individual's perception of themselves, including aspects of their personality, values, beliefs, and roles in various social contexts.

Social Reality

The combination of social conventions, agreements, and constructs understood by a society or social group.