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minimoo

PLEASE HELP medical x-rays, with a wavelength of about 10^-10m, can penetrate completely through your skin. Ultra violet rays, which cause sunburns by penetrating only the top level of skin, have a wavelength about 1000 times the wavelength of an x-ray. find the wavelength of ultraviolet rays. show your work. Hint: scientific notation.

  • one year ago
  • one year ago

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  1. AravindG
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    first did you get the wavelength of ultraviolet rays ?

    • one year ago
  2. minimoo
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    no i was going with 1000 x 10^-10 but thats not right.

    • one year ago
  3. AravindG
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    you are right !

    • one year ago
  4. minimoo
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    thats all i do?

    • one year ago
  5. AravindG
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    now just ensure you report answer in scientific notation

    • one year ago
  6. AravindG
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    ie in the form \[a \times 10^b\]

    • one year ago
  7. manishsatywali
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    |dw:1359548779460:dw|

    • one year ago
  8. manishsatywali
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    i have just use the scientific notation form

    • one year ago
  9. minimoo
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    so i dont have to solve it? and @manishsatywali why +3 to the exponent?

    • one year ago
  10. AravindG
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    @manishsatywali we at openstudy do not appreciate giving direct worked out answers like that .Instead help the user get to the answer. Refer openstudy COC http://openstudy.com/code-of-conduct

    • one year ago
  11. manishsatywali
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    I HAVE USED THE PROPERTY : M ^n * M ^ b = M ^(n+b)

    • one year ago
  12. minimoo
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    ???

    • one year ago
  13. manishsatywali
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    here M = 10 and n = 3 , b = -10

    • one year ago
  14. manishsatywali
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    did u get that ?

    • one year ago
  15. minimoo
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    whats the n for?

    • one year ago
  16. manishsatywali
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    n = 3

    • one year ago
  17. manishsatywali
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    10^3 * 10^(-10)

    • one year ago
  18. minimoo
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    but why do you need 10^3? where does it come from in the problem?

    • one year ago
  19. manishsatywali
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    1000 = 10 ^3

    • one year ago
  20. minimoo
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    wouldnt that be 1 x 10^3?

    • one year ago
  21. AravindG
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    \[10^3=1 \times 10^3\]

    • one year ago
  22. manishsatywali
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    @AravindG IS RIGHT DO U FOLLOW HIM NOW ?

    • one year ago
  23. minimoo
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    so thats how i get the -10+3?

    • one year ago
  24. manishsatywali
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    yup

    • one year ago
  25. AravindG
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    yep :)

    • one year ago
  26. manishsatywali
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    now u understand what i was trying to say

    • one year ago
  27. minimoo
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    so it would be (1 x 10^-10)(1 x 10^3) ? which simplifies to 1 x 10^-7?

    • one year ago
  28. minimoo
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    right?

    • one year ago
  29. manishsatywali
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    yes u got it

    • one year ago
  30. minimoo
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    ok :) thanks.

    • one year ago
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