# Math Help - Rearranging Equations?

1. ## Rearranging Equations?

Hi how would I go about rearranging the following equation to make $\lambda$ the subject?

Eph = hc\ $\lambda$

where Eph is the energy of a photon, h is Planck's constant, c is the speed of light and lambda is of course the wavelength.

I have an exam in the morning and I'm afraid I forget how to do this.

2. Originally Posted by jebus197
Hi how would I go about rearranging the following equation to make $\lambda$ the subject?

Eph = hc\ $\lambda$

where Eph is the energy of a photon, h is Planck's constant, c is the speed of light and lambda is of course the wavelength.

I have an exam in the morning and I'm afraid I forget how to do this.
you have the equation

$E_{ph}=\frac{hc}{\lambda} \iff \lambda E_{ph}=hc \iff \lambda =\frac{hc}{E_{ph}}$

3. I dig it. Thanks man...