Which type of electromagnetic radiation will cause the greatest number of electrons to be ejected from zinc metal with a work function of 350 kJ/mol? (LO 5.4, 5.5) (a) Dim light with a wavelength of 320 nm (b) Dim light with a wavelength of 360 nm (c) Bright light with a wavelength of 360 nm (d) Bright light with a wavelength of 375 nm

The photoelectric effect is the phenomenon where electrons are emitted from a material when it absorbs light or electromagnetic radiation. The energy of the incoming photons must exceed the work function of the material for electrons to be ejected. This concept is crucial for understanding how light interacts with metals and the conditions necessary for electron emission.

The work function is the minimum energy required to remove an electron from the surface of a material. It is typically expressed in electron volts (eV) or kilojoules per mole (kJ/mol). In this question, zinc has a work function of 350 kJ/mol, meaning that only photons with energy greater than this value can cause electron ejection.

The energy of a photon is inversely related to its wavelength, described by the equation E = hc/λ, where E is energy, h is Planck's constant, c is the speed of light, and λ is the wavelength. Shorter wavelengths correspond to higher energy photons. Understanding this relationship is essential for determining which light sources can effectively eject electrons from zinc.