## Kinetic Energy and Speed of Light Variables [ENDORSED]

Shirley Liu 2I
Posts: 64
Joined: Fri Sep 28, 2018 12:16 am

### Kinetic Energy and Speed of Light Variables

Is the variable "v" in the kinetic energy of an ejected electron equation (Ek=1/2 *Me*v^2) and in the speed of light equation (c=λν) the same? Are they both frequency?? I've been having trouble using both those equations to solve for specific values in the end

Aakash Tammana 3H
Posts: 18
Joined: Wed Nov 15, 2017 3:02 am

### Re: Kinetic Energy and Speed of Light Variables

In the kinetic energy equation, v = velocity. It's kinetic so you know it's going to be velocity instead of anything else.

Justin Haggard 1E
Posts: 17
Joined: Fri Sep 28, 2018 12:18 am

### Re: Kinetic Energy and Speed of Light Variables  [ENDORSED]

No, they are not the same.

In the speed of light equation ($c=\lambda \upsilon$), the $\upsilon$ is frequency (in s-1 or Hz)

In the kinetic energy equation, $(E_{k}=\frac{1}{2}M_{e}V_{e})$, the $V$ is velocity (in m.s-1)