A metal has a work function of 4.50 eV. Find the maximum kinetic energy of the photoelectrons if light of wavelength 250 nm shines on the metal

(1 eV = 1.60 × 10-19 J, c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ? s)
A) 0.00 eV
B) 0.37 eV
C) 0.47 eV
D) 0.53 eV


C

Physics & Space Science

You might also like to view...

The atmosphere of Titan is chiefly

A) ammonia. B) nitrogen. C) oxygen. D) methane. E) hydrogen.

Physics & Space Science

The technique for producing single crystals of turbine blades is by a modification of

(a) Investment casting (b) Directional solidification (c) The Bridgeman-Stockbarger technique (d) The Czochralski technique

Physics & Space Science

A resistor of unknown resistance and a 15-? resistor are connected across a 20-V emf in such a way that a 2.0 A current is observed in the emf. What is the value of the unknown resistance?

a. 75 ? b. 12 ? c. 7.5 ? d. 30 ? e. 5.0 ?

Physics & Space Science

____ are crucial in determining the distance to objects that are far away, but still in the Milky Way galaxy

a. RR Lyrae stars b. Cepheid variable stars c. O and B stars d. Emission nebulae e. Supernovae

Physics & Space Science