A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • one year ago

Help Medal and Fan if teach 4. Calculate the wavelength of electromagnetic radiation if the frequency is 2.50 x 1014 Hz?

  • This Question is Closed
  1. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    |dw:1443734331234:dw|

  2. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    v = frequency but i don't know what m is.

  3. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    and h is planks 6.626 x 10^-34

  4. Photon336
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 3

    @theonefatcat I would like to show you this problem step by step. the speed of light is equivalent to the speed of light times the frequency. \[c = \lambda *v \] we ask ourselves what we are looking for? we need wavelength so we rearrange our formula by isolating lambda like this |dw:1443734324536:dw| now after we do that we know that the speed of light c = 2.99x10^8 m/s and frequency is in 1/s so the units should be this. \[ \frac{ c }{ v } = \frac{ m/s }{ 1/s } = \frac{ m(s) }{ (s) } = m = \lambda \]

  5. Photon336
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 3

    sorry speed of light = wavelength times frequency

  6. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    ok so see where you're going but i don't really understand the units like m/s

  7. Photon336
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 3

    @Theonefatcat the reason why I did it like that was to show you the units we need. wavelength is in meters so the unit we need to find is meters that's to show you that this is the right equation to use. always remember to check the units too

  8. Photon336
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 3

    m/s = meters per second. that's how we measure speed. speed of light is in meters per second. and hertz is 1/seconds or seconds^-1

  9. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    |dw:1443734615005:dw|

  10. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    |dw:1443734721890:dw|

  11. Photon336
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 3

    yep :) \[\frac{ c }{ v } = \frac{ 2.99x10^{8} (m/s) }{ 2.50x10^{14} (1/s) } = \lambda \]

  12. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    |dw:1443734798401:dw|

  13. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    my teacher just tells us to round speed of light to 3 btw

  14. Photon336
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 3

    |dw:1443734899109:dw|

  15. Photon336
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 3

    @Theonefatcat yeah it's better if you round it to 3 i just took the exact number.

  16. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    ok so the answer is 1.2 x 10^-6 m

  17. Photon336
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 3

    @theonefatcat yep makes sense to me FYI |dw:1443735021493:dw|

  18. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    ok ty

  19. Photon336
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 3

    Yep no problem! remember like i did checking your units is such an important part to solving these problems, always ask yourself what units are wavelength in, meters and then check to see if those units cancel out to give you what you need in the equation.

  20. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    i will i have a big test tomorrow you really helped. He takes points of for not having the units.

  21. Photon336
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 3

    When I first did this i thought it was stupid to do that but it's actually very important. if you need meters and you end up with kilograms something is wrong. so yeah

  22. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    i might have another question when i get to a part where they ask about neutrons and photons.

  23. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    so i'll ask again later.

  24. Not the answer you are looking for?
    Search for more explanations.

    • Attachments:

Ask your own question

Sign Up
Find more explanations on OpenStudy
Privacy Policy

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...

23

  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.