Photoelectric effect and atomic spectra difference

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taiyeojeikere-3C
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Joined: Fri Sep 28, 2018 12:26 am

Photoelectric effect and atomic spectra difference

Postby taiyeojeikere-3C » Sun Oct 14, 2018 10:24 pm

What's the difference between the photoelectric effect and atomic spectra. Both require light to shine on a metal and detect the motion of the electrons. The photoelectric effect tells if the wavelength is small enough to move the electron to the positively charged detector. And does the atomic spectra detect how much the electron moves and which energy level it travels to? So how are these two things different?

Srikar_Ramshetty 1K
Posts: 64
Joined: Fri Sep 28, 2018 12:27 am

Re: Photoelectric effect and atomic spectra difference

Postby Srikar_Ramshetty 1K » Sun Oct 14, 2018 11:38 pm

The atomic spectra isn't completely related to light shining on a metal. In the photoelectric effect scientists were looking to eject electrons, while the atomic spectra the electron is still in the vicinity of the nucleus but at a higher energy level. These electrons will return to the ground state or a lower energy level and in the process release energy in the form of light. To answer your second question the atomic spectra measures the amount of energy released when an electron moves energy levels. The different frequencies or wavelengths of light we can detect can tell us how much energy was released.

Hope that helped!

Elias Omar 1G
Posts: 52
Joined: Fri Sep 28, 2018 12:17 am

Re: Photoelectric effect and atomic spectra difference

Postby Elias Omar 1G » Sun Oct 14, 2018 11:50 pm

Atomic spectra shows the frequencies of electromagnetic radiation that a particular atom has the ability to emit as an electron changes energy levels. The photoelectric effect has nothing to do with the types of EM radiation, rather it deals with the energy it takes to remove an electron from the atom entirely.

Carlos Gomez 3H
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Joined: Fri Sep 28, 2018 12:25 am

Re: Photoelectric effect and atomic spectra difference

Postby Carlos Gomez 3H » Mon Oct 15, 2018 2:17 am

Just for quick clarification, the electron that is emitted during the photoelectric effect is released in the form of heat? Or simply just energy? Or does it depend on the type of metal used?


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