# Rearranging equations?

1. Jul 20, 2011

### raid517

Please can someone show me the steps needed to go about rearranging the equation Eph = hc/lambda to make lambda (the wavelength of the light) the subject? I'm totally stuck and I have an exam in the morning. I suspect this is one of the questions that will come up. I know it should be simple but I'm just not getting it. Any and all help is appreciated.

2. Jul 20, 2011

### bacon

I am assuming that the ph on the left side of the equation is a subscript for photon and that the equation looks like this.
$E_{ph}=\frac{hc}{\lambda}$

I also assume that by "make(ing) lambda (the wavelength of the light) the subject" you mean that you want to solve the equation for lambda.

This is an algebra question. I found a link in the Math and Science learning materials section of this forum:
To get you started, what would happen to your equation if you multiplied both sides by $\lambda$ ?