1. Violet light of wavelength 410 nm ejects electrons with a maximum kinetic energy of 0.81 eV from a certain metal. What is the work function of electrons to this metal, in electron volts?

2. Suppose a 0.39 kg billiard ball has a wavelength of 7.7 cm. This wavelength is big enough so that the ball can interfere with other billiard balls. What is the velocity, in meters per second, of the billard ball?

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1 Oriven wavelength 2 410nm 410x107m max KE 081 ev to ... View the full answer