Calculating Emission Wavelength for Excited Atoms at 3.031x10^-19 J Energy Level

[pishogues]

Homework Statement

A sample of excited atoms lies 3.031×10^−19 J above the ground state. What is the emission wavelength of these atoms?

Relevant Equations

E=hc/λ

Problem Statement: A sample of excited atoms lies 3.031×10^−19 J above the ground state. What is the emission wavelength of these atoms?
Relevant Equations: E=hc/λ

λ=hc/E

I'm stuck on the first part. i.e;

something / 3.031x10^-19J

 

[Phylosopher]

Problem Statement: A sample of excited atoms lies 3.031×10^−19 J above the ground state. What is the emission wavelength of these atoms?
Relevant Equations: E=hc/λ

something / 3.031x10^-19J

What is $h$? what is $c$?

If you don not know, go to "photon energy" wiki page.