# Quantum! Particle in a box problem! HELP

Quantum! Particle in a box problem! HELP!!!

An electron in a rigid box absorbs light. The longest wavelength in the absorbstion spectrum is 600nm. How long is the box?

$$\lambda$$ = c/f
E=hf
E= n2*((h2)/(8mL2))

so i figured out E from the wavelength to frequency formula and the E=hf. then i just Solved for L. i used n=1 and i keep getting the wrong answer. Should n be a different value?

Related Introductory Physics Homework Help News on Phys.org
cepheid
Staff Emeritus