AP EAMCET · Chemistry · Structure of Atom
If the work function for the photoelectron emission of a metal is , then the threshold wave length of the radiation needed for the ejection of the electron is approximately
- A
- B
- C
- D
Answer & Solution
Correct Answer
(C)
Step-by-step Solution
Detailed explanation
Work function of metal ϕ=3.75 eV=3.75×1.6×10-19V=6×10-19V Planck's constant h=6.63×10-34J.s Velocity of light c=3×108 m/s Wavelength = hcϕ=6.63×10-34×3×1086×10-19=331.5 ×10-9m=331.5 nm Hence, the…
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