Exp7_prelab - To understand the relationships between...

Info icon This preview shows pages 1–8. Sign up to view the full content.

View Full Document Right Arrow Icon
Image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
To understand the relationships between wavelength, frequency, and energy of electromagnetic radiation To measure the energies of the photons emitted or absorbed by gases To use this spectral information to determine the energy levels of gaseous atoms
Image of page 2
Visible light constitutes only a small portion of the electromagnetic spectrum
Image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
The wavelength and frequency are related by the speed of electromagnetic radiation, c= 3.00 x 108m/s c = λν where λ≡ wavelength (m) and ν≡ frequency (s-1) The energy, E, associated with a particular frequency can be calculated using Planck’s constant (h = 6.63 x 10-34J•s) E = h ν
Image of page 4
Sunlight (white light) contains all wavelengths of visible light. In other words, it gives a continuous spectrum, observed as a rainbow. Incandescent solids, liquids, and high pressure gases also give continuous spectra. When an electric current is passed through a gas in a vacuum tube, however, only certain colors of light are emitted.
Image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Color Wavelength (nm) Violet 400-430 Blue 430-490 Green 490-570 Yellow 570-590 Orange 590-640 Red 640-750
Image of page 6
Why are only certain energies emitted or absorbed?
Image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 8
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern