Question

If the maximum kinetic energy of emitted photo electrons from a metal is 0.9 eV and work function is 2.2 eV then the energy and wavelength of incident radiation are

• A. 3.1 eV, 4000 \AA
• B. 2.2 eV, 2000 \AA
• C. 2.2 eV, 4000 \AA
• D. 3.1 eV, 2000 \AA

Hint:

Incident Energy = Work Function + Kinetic Energy. Use 12400 for quick eV-to-Angstrom conversions.

Answer 1

The Correct Option is A