E=hcλ2E=\dfrac{h c}{\lambda^{2}}E=λ2hc
E=hcλE=\dfrac{hc}{\lambda }E=λhc
E=hλcE=\dfrac{h\lambda }{c}E=chλ
E=hλ2cE=\dfrac{h\lambda ^2}{c}E=chλ2