Assume that a 100-W light bulb gives off of its energy as visible light. How many photons of visible light are given off in 1.00 min? (Use an average visible wavelength of 550 nm.)
Answer to relevant QuestionsA metal with a work function of 2.40 eV is illuminated by a beam of monochromatic light. If the stopping potential is 2.50 V, what is the wavelength of the light? When light of wavelength of 250 nm is incident on a metal surface, the maximum speed of the photoelectrons is 4.0 x 105 m/s. What is the work function of the metal in eV? What are the wavelength and frequency of the most intense radiation component from a blackbody with a temperature of 0oC? Find the energy of a hydrogen atom whose electron is in the (a) n = 2 state and (b) n = 3 state. (a) For which of the following transitions in a hydrogen atom is the photon of longest wavelength emitted: (1) n = 5 to n = 3, (2) n = 6 to n = 5, or (3) n = 2 to n = 1? (b) Justify your answer mathematically.
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