If a metal has a work function of 4 eV, what is the minimum wavelength of light required to cause the photoelectric effect?
Practice Questions
1 question
Q1
If a metal has a work function of 4 eV, what is the minimum wavelength of light required to cause the photoelectric effect?
310 nm
620 nm
1240 nm
2480 nm
The minimum wavelength can be calculated using the equation λ = hc/W. Substituting h = 4.14 x 10^-15 eV·s, c = 3 x 10^8 m/s, and W = 4 eV gives λ = 310 nm.
Questions & Step-by-step Solutions
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Q
Q: If a metal has a work function of 4 eV, what is the minimum wavelength of light required to cause the photoelectric effect?
Solution: The minimum wavelength can be calculated using the equation λ = hc/W. Substituting h = 4.14 x 10^-15 eV·s, c = 3 x 10^8 m/s, and W = 4 eV gives λ = 310 nm.
