8. (TCO 8) This question requires a numeric or algebraic answer. In order to rec

Question

8. (TCO 8) This question requires a numeric or algebraic answer. In order to receive full credit for this problem you must show all your work. To show your work for this problem you may scan neatly handwritten work or type up your work in MS Word using the equation editor and submit it using the Final Exam Dropbox. You should make your submissions after you complete the exam.
Electrons in a photoelectric effect experiment emerge from a tungsten surface with a maximum kinetic energy of 1.30 eV. What is the wavelength of the light? (Points : 20) 8. (TCO 8) This question requires a numeric or algebraic answer. In order to receive full credit for this problem you must show all your work. To show your work for this problem you may scan neatly handwritten work or type up your work in MS Word using the equation editor and submit it using the Final Exam Dropbox. You should make your submissions after you complete the exam.
Electrons in a photoelectric effect experiment emerge from a tungsten surface with a maximum kinetic energy of 1.30 eV. What is the wavelength of the light? (Points : 20)

Explanation / Answer

hc/lemda = work function + Kinetic energy = W + 1.30 eV = 1.3*1.6*10^-19 = 2.08*10^-19 = hc / lemda

lemda = 6.626*10^-34 * 3*10^8 /2.08*10^-19 = 6.626*10^-7 *3/2.08 = 9.93 *10^-7 = 993 nm

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