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boomerang285

  • 2 years ago

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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  1. kausarsalley
    • 2 years ago
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    plug in the values you have in the formula..

  2. boomerang285
    • 2 years ago
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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

  3. boomerang285
    • 2 years ago
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    f=3.00x(10^8)/268nm

  4. boomerang285
    • 2 years ago
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    I feel like I am missing a step or something.

  5. kausarsalley
    • 2 years ago
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    you did not concert the wavelength which is on nanometers into meters..

  6. kausarsalley
    • 2 years ago
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    can you do that or should i help with that??

  7. boomerang285
    • 2 years ago
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    2.68 x 10^7 ?

  8. boomerang285
    • 2 years ago
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    10^-7?

  9. kausarsalley
    • 2 years ago
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    no..... nano = 1* 10^-9

  10. kausarsalley
    • 2 years ago
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    does that help??

  11. boomerang285
    • 2 years ago
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    im a little confused.

  12. kausarsalley
    • 2 years ago
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    @boomerang285 are you there?

  13. kausarsalley
    • 2 years ago
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    where??

  14. boomerang285
    • 2 years ago
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    I really don't understand this.

  15. boomerang285
    • 2 years ago
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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?

  16. kausarsalley
    • 2 years ago
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    to convert the wavelength from nanometers to meters you need to multiply by 10^-9

  17. kausarsalley
    • 2 years ago
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    nano in its number state is 10^-9.....so nm=10^-9m

  18. boomerang285
    • 2 years ago
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    ok

  19. kausarsalley
    • 2 years ago
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    no since nano is 10^-9, it is supposed to be 2.68 x 10^-9m

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

  21. kausarsalley
    • 2 years ago
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    yes....so what do you get after you plug in the numbers??

  22. boomerang285
    • 2 years ago
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    this is the tricky part for me.. I dont know how to correctly work it out

  23. boomerang285
    • 2 years ago
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    it looks like this though right? 3.00 x 10^8 / 2.68 x 10^-9

  24. kausarsalley
    • 2 years ago
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    yes...

  25. boomerang285
    • 2 years ago
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    ok

  26. boomerang285
    • 2 years ago
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    80.4? probably way off...

  27. kausarsalley
    • 2 years ago
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    input what you have on your calculator...

  28. kausarsalley
    • 2 years ago
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    that is not what i got..

  29. boomerang285
    • 2 years ago
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    0.1119402985

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

  31. kausarsalley
    • 2 years ago
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    does that help??

  32. boomerang285
    • 2 years ago
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    yes, i just didnt have the negative for the 10^-8

  33. kausarsalley
    • 2 years ago
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    oh okay...you have to be careful next time.

  34. kausarsalley
    • 2 years ago
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    do you get it now??

  35. boomerang285
    • 2 years ago
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    yes, so obviously I don't put in all the numbers.. so f = 11.15?

  36. kausarsalley
    • 2 years ago
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    yes...

  37. boomerang285
    • 2 years ago
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    thank you!

  38. kausarsalley
    • 2 years ago
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    yw!

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