## Graph using einstein equation

$E=hv$

Jimmy lira-1G
Posts: 61
Joined: Fri Apr 06, 2018 11:03 am

### Graph using einstein equation

I saw a question on review that asked:

Draw a graph comparing the inverse wavelength of a photon versus the energy of photon (label axis)
- I understand that the einstein equation us used and the equation to graph is
E= hc/wavelength, however I was unclear how they graphed a line from this equation, how do I put that equation into y=mx +b form ?
-Jimmy Lira 1 G

Chem_Mod
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### Re: Graph using einstein equation

Hey Jimmy, so this question requires us to plot the "inverse wavelength" and energy of the photon. You are correct to think that we will be using E = hc/wavelength. In order to derive a linear relationship of the two, we can name E (energy) as our Y on the graph and 1/lambda as our X. As a result we will have Y = hc*X. h and c are both constants so their product would also be a constant. Thus the slope of this graph would be m = h*c. Hope this helps!

Chem_Mod
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### Re: Graph using einstein equation

And if you compare the equation y=mx +b and E=hc(1/λ) the y corresponds to E, the constant hc corresponds to m, and x corresponds to (1/λ). The value of b (the y- intercept) would be 0 in this case.