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anonymous

  • one year ago

WILL FAN AND MEDAL The wavelength of a specific photon in the infrared spectrum is 4 × 10^-6 meters. Given that the speed of light is 2.998 × 10^8 m/s, what would be the frequency of this infrared wave? 11.992*10^2 Hz 0.7495*10^-14 Hz 11.992 * 10^-2 Hz 0.7495 * 10^14 Hz

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  1. cuanchi
    • one year ago
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    speed of light = wavelength x frequency frequency = speed of light/ wavelength do the math!!

  2. anonymous
    • one year ago
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    @Cuanchi if I knew how to do the math I wouldn't be on here

  3. Photon336
    • one year ago
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    @whateven we need to understand the units first, I agree with what @Cuanchi said

  4. Photon336
    • one year ago
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    speed of light is m/s and the wavelength is in meters.

  5. anonymous
    • one year ago
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    This is what my question is I can't change it and if I don't answer correctly my gpa goes down

  6. Photon336
    • one year ago
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    let's take @Cuanchi's formula \[\frac{ speed of light }{ wavelength } = \frac{ m/s }{ m } = \frac{ 1}{ s } = frequency\] all you need to do is plug in the numbers.

  7. anonymous
    • one year ago
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    I don't know where to plug them in and get a result that matches my choices that's the problem

  8. cuanchi
    • one year ago
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    The units are wavelength = meters speed of light = meters/ seconds frequency = 1/seconds you dont need to do any conversion of units, just apply the formula that correlate the speed of light with the wavelength and the frequency

  9. Photon336
    • one year ago
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    \[\frac{ 1 }{ s } = hertz \]

  10. cuanchi
    • one year ago
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    it is a simple division of the value of speed of light divided by the wavelenght

  11. cuanchi
    • one year ago
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    Hz = 1/seconds = 1/s

  12. Photon336
    • one year ago
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    plug the numbers in and tell us what you get before you submit your answer

  13. anonymous
    • one year ago
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    This still isn't helping. I plug it in like you say and my calculator says syntax error ?

  14. cuanchi
    • one year ago
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    2.998 × 10^8 m/s /4 × 10^-6 meters= x.xxx 10^xx

  15. anonymous
    • one year ago
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    that's what i typed in. It said syntax error

  16. Photon336
    • one year ago
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    @whateven use ( ) around the numbers like this \[\frac{ (2.99x10^{8}) m/s }{ (4.0x10^{-6})m }= Hz \]

  17. Photon336
    • one year ago
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    You can also enter this in on a scientific calculator online

  18. anonymous
    • one year ago
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    7.495*10^13 so something is wrong @photon336

  19. anonymous
    • one year ago
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    ????

  20. Photon336
    • one year ago
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    That's correct,

  21. Photon336
    • one year ago
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    but in the answers they wrote it strangely, if you moved the decimal place in the 7.4 1 over to the right what answer choice would you get?

  22. anonymous
    • one year ago
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    The last one?

  23. Photon336
    • one year ago
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    yeah that's it

  24. anonymous
    • one year ago
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    Thanks!

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