3) A metal with a work function of 2.4 eV is illuminated with monochromatic ligh

Question

3) A metal with a work function of 2.4 eV is illuminated with monochromatic light. The stopping potential that prevents electrons being ejected is 0.82 eV. Find the wavelength of light. ANS: ? = 385 nm 3) A metal with a work function of 2.4 eV is illuminated with monochromatic light. The stopping potential that prevents electrons being ejected is 0.82 eV. Find the wavelength of light. ANS: ? = 385 nm

Explanation / Answer

We know that eVo + W = hc / lambda ==> lambda = h c / [ eVo + W ] = 6.6 x 10^-34 * 3 x 10^8 / [ 0.82 + 2.4 ] * 1.6 x 10^-19 = 385 x 10^-9 m = 385 nm

Related Questions

Navigate

• Browse (All)
• Browse 3
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.