# Rearranging Equations?

• May 12th 2011, 03:03 PM
jebus197
Rearranging Equations?
Hi how would I go about rearranging the following equation to make $\displaystyle \lambda$ the subject?

Eph = hc\$\displaystyle \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.
• May 12th 2011, 03:23 PM
TheEmptySet
Quote:

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

Eph = hc\$\displaystyle \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

$\displaystyle E_{ph}=\frac{hc}{\lambda} \iff \lambda E_{ph}=hc \iff \lambda =\frac{hc}{E_{ph}}$
• May 12th 2011, 03:51 PM
jebus197
I dig it. Thanks man...