What is the ratio between the energies of two types of radiation whose wavelengths are `6000Å and 2000Å` respectively. 

Explanation

`lambda_(1)=6000Å=6xx10^(-7)m,lambda_(2)=2000Å=2xx10^(-7)m`
  Ratio between energies `(E_(1))/(E_(2))=(hc)/(6xx10^(-7))xx(2xx10^(-7))/(hc)=(1)/(3)`