A Metal Has a Work Function of 4

question 22

Multiple Choice

A metal has a work function of 4.50 eV.Find the maximum kinetic energy of the photoelectrons if light of wavelength 250 nm shines on the metal.(1 eV = 1.60 × 10^-19 J,c = 3.00 × 10⁸ m/s,h = 6.626 × 10^-34 J ∙ s)

• A)0.00 eV
• B)0.37 eV
• C)0.47 eV
• D)0.53 eV

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Definitions:

Solar Radiation

The electromagnetic energy emitted by the sun, including visible light, ultraviolet light, and infrared energy, which drives Earth's climate system.

Trapped Heat

Heat that is contained within a system, such as the Earth's atmosphere or oceans, not easily released back into space, contributing to warming effects.

Atmospheric Pressure

The pressure, or force per unit area, exerted by the atmosphere; generally greater at sea level than in high elevations.

Forces

Forces are influences that cause an object to undergo a certain change in motion, direction, or geometrical construction. In physics, forces are what cause acceleration in objects with mass.