Two different monochromatic light sources, one yellow (580 nm) and one violet (425 nm), are used

Step 1: Calculate the work function of the metal using the formula: $W = h times f_{text{thresho

Question

Two different monochromatic light sources, one yellow $(580 \mathrm{nm})$ and one violet $(425 \mathrm{nm})$, are used in a photoelectric effect experiment. The metal surface has a photoelectric threshold frequency of $6.20 \times 10^{14} \mathrm{Hz}$. (a) Are both sources able to eject photoelectrons from the metal? Explain. (b) How much energy is required to eject an electron from the metal? (Use $h=4.136 \times 10^{-15} \mathrm{eV} \cdot$ s. $)$

          Two different monochromatic light sources, one yellow $(580 \mathrm{nm})$ and one violet $(425 \mathrm{nm})$, are used in a photoelectric effect experiment. The metal surface has a photoelectric threshold frequency of $6.20 \times 10^{14} \mathrm{Hz}$.
(a) Are both sources able to eject photoelectrons from the metal? Explain. (b) How much energy is required to eject an electron from the metal? (Use $h=4.136 \times 10^{-15} \mathrm{eV} \cdot$ s. $)$

Added by Thomas H.

University Physics with Modern Physics

Hugh D. Young 14th Edition

Instant Answer

Solved by Expert Ivan Kochetkov

06/18/2022

Step 1

136 \times 10^{-15} \text{ eV} \cdot \text{s}$ $f_{\text{threshold}} = 6.20 \times 10^{14} \text{ Hz}$ Plugging in the values: $W = 4.136 \times 10^{-15} \times 6.20 \times 10^{14} = 25.65 \text{ eV}$ Show more…

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Two different monochromatic light sources, one yellow $(580 \mathrm{nm})$ and one violet $(425 \mathrm{nm})$, are used in a photoelectric effect experiment. The metal surface has a photoelectric threshold frequency of $6.20 \times 10^{14} \mathrm{Hz}$. (a) Are both sources able to eject photoelectrons from the metal? Explain. (b) How much energy is required to eject an electron from the metal? (Use $h=4.136 \times 10^{-15} \mathrm{eV} \cdot$ s. $)$