superaltamont
Oct5-10, 11:04 PM
1. The problem statement, all variables and given/known data
Calculate the wavelength in nm of light (Hz) illuminating a sodium surface if the threshold wavelength of sodium is 544 nm and the kinetic energy of the electron emitted is 2.20 × 10-19 J. Express answer in scientific notation.
2. Relevant equations
E=hv; E=hc/lambda; E=h/mv
3. The attempt at a solution
Calculate the wavelength in nm of light (Hz) illuminating a sodium surface if the threshold wavelength of sodium is 544 nm and the kinetic energy of the electron emitted is 2.20 × 10-19 J. Express answer in scientific notation.
2. Relevant equations
E=hv; E=hc/lambda; E=h/mv
3. The attempt at a solution