Model Lamps
Model Lamps
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 LJ 300x Scale Train Model Lamppost Lamp Light HO TT  US $128.00
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 LF 300x Scale Train Model Lamppost Lamp Light HO TT US $109.00
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 LT25 300x Scale Train Model Lamppost Lamp Light HO TT US $95.00
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 LT15 300x Scale Train Model Lamppost Lamp Light HO TT US $61.00
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 T25S60 pcs model lamppostsWhite light led12 Vlamp US $57.99
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 H01S50 pcs model lamppostsWarm white led12 Vlamp US $57.99
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 T25S60 pcs model lamppostsWarm white led12 Vlamp US $57.99
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 100 HO or N Gauge Model Train Layout Scenery 12V lampposts lamp Lights 45mm T39 US $49.99
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 LJ 100x Scale Train Model Lamppost Lamp Light HO TT US $48.50
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 KATO HO RAILROAD MODEL 3 CAR KIT AC F 70t OPEN SIDE COVERED HOPPER GE LAMPS US $45.00
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 LF 100x Scale Train Model Lamppost Lamp Light HO TT US $42.80
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 Train Model Lamppost Lamp Light HO TT US $40.00
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 H02 30 model lamppostsWarm white led12 Vlamp US $39.99
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 H0330 pcs model lamppostsWarm white led12 Vlamp US $39.99
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 T82B30 pcs Model street lights 85mmwarm white LED12Vmodel lamppostlamp US $39.99
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 H0330 pcs model lamppostsWhite light led12 Vlamp US $39.99
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 T82B30 pcs Model street lights 85mmwhite light LED12Vmodel lamppostlamp US $39.99
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 H31 40 model lamppostswhite light led12VCeilingwall lightFree scale lamp US $38.99
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 H31 40 model lamppostsWarm white led12VCeilingwall lightFree scale lamp US $38.99
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 H32 40 model lamppostswhite light led12VCeilingwall lightFree scale lamp US $36.99
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 T2540 pcs model lamppostsWarm white led12 Vlamp US $35.98
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 T82 50pcs 12V scale train layout model lamppost lamp HO US $35.99
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 H30 40 model lamppostswhite light led12VCeilingwall lightFree scale lamp US $35.99
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 KATO HO RAILROAD MODEL 3 CAR KIT AC F 70t OPEN SIDE COVERED HOPPER G E LAMPS US $35.95
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 H1820 Model lampposts 75mmwhite light LED12Vlamp US $35.00
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 H1820 Model lampposts 75mmwarm white LED12Vlamp US $35.00
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Can you design an experiment to test the Bohr model of the hydrogen atom?
All i have to work with is a Hydrogen vapor lamp, spectrometer (600±3 slits/mm).
Also I need to know how to explain why light of different wavelengths is separated by an interference grating.
Thanks!
Read the wiki about diffraction gratings and let me know if you have any questions.
http://en.wikipedia.org/wiki/Diffraction_grating
The bottom line is that the diffraction grating will separate out the different frequencies of light. The angle at which the light comes out can be related to the frequency or wavelength by a simple formula.
The bohr model predicts that electrons orbit the nucleus like a planet orbits the sun. The big assumptions are that:
1) the centripetally accelerating electrons do not radiate (which violates everything we know about electricity and magnetism) and
2) the angular momentum is quantized--it only comes in bite size pieces.
L = n h-bar, where n is an integer and h-bar is this teeny, tiny amount of angular momentum
From that, you can fairly easily work out that only certain energy levels are allowed:
E(n) = - 13.6 eV / n^2
Hydrogen radiates when an electron jumps from a higher level to a lower one and releases an energy:
deltaE = E(nf) - E(ni) = 13.6 eV (1/nf^2 - ni^2)
which goes to a photon with that same energy
= hf = hc / lambda
So you only get certain wavelengths. Tou can work out all the possibilites and get the lyman series and the balmer series and all that. And when you shine the light on the diffraction grating, you will in fact find those lines in those series.
If you want a test the Bohr model will fail, there are a couple things you can do.
If you have really, really good equipment, you can look really really closely at the spectral lines and find that some of them are split. The Bohr model doesn't account for this fine structure. Another thing you can do is run the experiment in the presence of a very strong magnetic or electric field. The spectral lines will be split by the Zeeman or Starke effects, which also can't be explained by the Bohr model. And of course, the Bohr model was never successfully extended to atoms with more than one electron.