Question

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

Answer 1

plug in the values you have in the formula..

Answer 2

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

Answer 3

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

Answer 4

I feel like I am missing a step or something.

Answer 5

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

Answer 6

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

Answer 7

2.68 x 10^7 ?

Answer 8

10^-7?

Answer 9

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

Answer 10

does that help??

Answer 11

im a little confused.

Answer 12

@boomerang285 are you there?

Answer 13

where??

Answer 14

I really don't understand this.

Answer 15

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?

Answer 16

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

Answer 17

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

Answer 18

ok

Answer 19

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

Answer 20

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

Answer 21

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

Answer 22

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

Answer 23

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

Answer 24

yes...

Answer 25

ok

Answer 26

80.4? probably way off...

Answer 27

input what you have on your calculator...

Answer 28

that is not what i got..

Answer 29

0.1119402985

Answer 30

http://www.wolframalpha.com/input/?i=%283+x+10%5E-8%29%2F%282.68+x+10%5E-9%29

Answer 31

does that help??

Answer 32

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

Answer 33

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

Answer 34

do you get it now??

Answer 35

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

Answer 36

yes...

Answer 37

thank you!

Answer 38

yw!