Spectroscopy Lab Report
Materials 1 spectroscope 1 incandescent bulb 1 hydrogen gas discharge tube 1 mercury discharge tube 1 nitrogen gas discharge tube 1 fluorescent light 1 neon gas discharge tube Solar light source 1 discharge tube apparatus
Procedure The procedure of using a spectroscope was practiced with a fluorescent light source. The slit was pointed towards the source, and the spectroscope was shifted until the spectrum was clearly visible. The appearance of the spectrum from the fluorescent light source was recorded. A discharge tube apparatus was retrieved from a lab cart for demonstration. A hydrogen discharge tube was inserted into the discharge tube apparatus with the spring loaded end first, followed by the non-spring loaded end. The discharge tube apparatus was plugged into the outlet. The hydrogen discharge tube was observed, the colour was noted after …show more content…
(2 marks)
An emission spectrum measures the amount of photons emitted at particular wavelengths with particularly bright lines. Photons are emitted when excited electrons move to higher energy levels and then releases energy to return to the ground state. Since there are different wavelengths of photons depending on the energy released, one can utilize information on the emission spectrum to predict what shells the electrons were at before returning to their ground state.
An absorption spectrum indicates the wavelengths at which photons were absorbed with black spectral lines. For example, when white light is shone on a substance, photons from the white light may hit the atom, and if the energy provided by the photon is exactly the same as the energy an electron needs to move levels, that electron will absorb the photon, and the wavelength at which this occurs will be a black spectral line.
Thinking & Inquiry How is the spectra produced by the incandescent light and the gas discharge tubes similar and different. (2
Procedure The procedure of using a spectroscope was practiced with a fluorescent light source. The slit was pointed towards the source, and the spectroscope was shifted until the spectrum was clearly visible. The appearance of the spectrum from the fluorescent light source was recorded. A discharge tube apparatus was retrieved from a lab cart for demonstration. A hydrogen discharge tube was inserted into the discharge tube apparatus with the spring loaded end first, followed by the non-spring loaded end. The discharge tube apparatus was plugged into the outlet. The hydrogen discharge tube was observed, the colour was noted after …show more content…
(2 marks)
An emission spectrum measures the amount of photons emitted at particular wavelengths with particularly bright lines. Photons are emitted when excited electrons move to higher energy levels and then releases energy to return to the ground state. Since there are different wavelengths of photons depending on the energy released, one can utilize information on the emission spectrum to predict what shells the electrons were at before returning to their ground state.
An absorption spectrum indicates the wavelengths at which photons were absorbed with black spectral lines. For example, when white light is shone on a substance, photons from the white light may hit the atom, and if the energy provided by the photon is exactly the same as the energy an electron needs to move levels, that electron will absorb the photon, and the wavelength at which this occurs will be a black spectral line.
Thinking & Inquiry How is the spectra produced by the incandescent light and the gas discharge tubes similar and different. (2