boomerang285
f=c/wavelength. Please help, not sure how to calculate f. c= 3.00 x 10^8 m/s wavelength = 268nm



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kausarsalley
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plug in the values you have in the formula..

boomerang285
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but i get a giant number, and not sure what I do after that.. i need to figure out f=____hz

boomerang285
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f=3.00x(10^8)/268nm

boomerang285
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I feel like I am missing a step or something.

kausarsalley
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you did not concert the wavelength which is on nanometers into meters..

kausarsalley
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can you do that or should i help with that??

boomerang285
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2.68 x 10^7 ?

boomerang285
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10^7?

kausarsalley
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no.....
nano = 1* 10^9

kausarsalley
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does that help??

boomerang285
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im a little confused.

kausarsalley
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@boomerang285 are you there?

kausarsalley
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where??

boomerang285
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I really don't understand this.

boomerang285
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I don't get how to plug in the numbers, when I have to change them as well. 268 nm changes to meters right? is it not 268nm= 2.68 x 10^7m?

kausarsalley
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to convert the wavelength from nanometers to meters you need to multiply by 10^9

kausarsalley
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nano in its number state is 10^9.....so nm=10^9m

boomerang285
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ok

kausarsalley
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no since nano is 10^9, it is supposed to be 2.68 x 10^9m

boomerang285
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oh ok.... makes sense, so then the equation (f=c/wavelength) has those values in it?

kausarsalley
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yes....so what do you get after you plug in the numbers??

boomerang285
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this is the tricky part for me.. I dont know how to correctly work it out

boomerang285
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it looks like this though right? 3.00 x 10^8 / 2.68 x 10^9

kausarsalley
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yes...

boomerang285
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ok

boomerang285
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80.4? probably way off...

kausarsalley
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input what you have on your calculator...

kausarsalley
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that is not what i got..

boomerang285
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0.1119402985


kausarsalley
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does that help??

boomerang285
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yes, i just didnt have the negative for the 10^8

kausarsalley
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oh okay...you have to be careful next time.

kausarsalley
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do you get it now??

boomerang285
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yes, so obviously I don't put in all the numbers.. so f = 11.15?

kausarsalley
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yes...

boomerang285
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thank you!

kausarsalley
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yw!