Light of 620 nm gives electrons with a largest kinetic energy of 0.3 eV from a metal. The light is changed to 413 nm. What is the new largest kinetic energy? Use hc = 1240 eV nm.

PhysicsHardHigh School (11–12)Modern Physics › Dual Nature of Radiation and Matter

Light of $620\ \text{nm}$ gives electrons with a largest kinetic energy of $0.3\ \text{eV}$ from a metal. The light is changed to $413\ \text{nm}$ . What is the new largest kinetic energy? Use $hc = 1240\ \text{eV nm}$ .

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