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anonymous

  • one year ago

WILL FAN AND MEDAL PLEASE HELP The wavelength of red light is given as 6.5 × 10È¥ m. If another wave of an unknown type has a frequency of 5.3 × 10¹¢ Hz. What is the relation between the wavelength of the unknown wave and red light? (note: c = 2.998 × 10§ m/s) The wavelength of the unknown wave is less than the wavelength of the red light the wavelength of the wave is greater than the wavelength of the red light the wavelength of the wave is equal to the wavelength red light the wavelength of the wave is not related to the wavelength of the red light

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  1. Rushwr
    • one year ago
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    \[c = f \lambda \]

  2. Rushwr
    • one year ago
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    c = velocity f= frequency \[\lambda = wavelength \]

  3. anonymous
    • one year ago
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    I have no clue what to do with that...

  4. anonymous
    • one year ago
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    I think it's A but I'm not sure...

  5. Rushwr
    • one year ago
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    to compare the wavelengths we have to obtain a value for the wavelength of the unknown wave using the above equation obtain a value. \[\lambda = \frac{ c }{ f } \]

  6. anonymous
    • one year ago
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    So... C? because that's what's looking right now...

  7. Rushwr
    • one year ago
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    no no !! Wait I'll tell you but tell me the value for C !!! It's a little unclear !

  8. Rushwr
    • one year ago
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    if u don't mind right the values here again it's a little unclear !! type it here, don't copy paste

  9. anonymous
    • one year ago
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    2.998*10^8 m/s

  10. anonymous
    • one year ago
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    sorry open study turns the notations into weird symbols

  11. Rushwr
    • one year ago
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    what about the values for others !!! It's not clear ! ^_^

  12. anonymous
    • one year ago
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    6.5*10^-7 is the first one and 5.3*10^15

  13. Rushwr
    • one year ago
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    aaah okai. Now we know the wavelength of the red light. We are given with the frequency of the unknown wave. Looking at the answers we can see that they have compared the wavelengths. We only know the wavelength of the red light, to compare the wavelengths we have to find the wavelength of the unknown wave right? Do u understand up to this point ?

  14. anonymous
    • one year ago
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    I do.

  15. anonymous
    • one year ago
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    I just don't know how to find the wave length, I get confused with the numbers

  16. Rushwr
    • one year ago
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    Now we have to find the wavelength of the unknown wave. So we are gonna use the above equation: \[c = f \lambda \] \[\lambda = \frac{ c }{ f } = \frac{ 2.998 * 10^{8} }{ 5.3 * 10^{15} }\]

  17. Rushwr
    • one year ago
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    \[\lambda = 5.65 * 10^{-8}\]

  18. Rushwr
    • one year ago
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    As we can see that the unknown wave has a shorter wavelength than the red light !

  19. anonymous
    • one year ago
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    Thank you!

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