Experimental set-up The hydrogen spectrum in the visible band is recorded on a photographic plate (spectrogram), which is set between two plexiglas plates. - Calculated Rydberg constant with its uncertainty. (12) Figure 2. Apparatus and setup for the Balmer series experiment. with the Rydberg constant R given by 4 8 23 e o me R εhc = . Discrete emission line spectra of hydrogen is observed and measured using diraction grating spectrometry to obtain the respective wavelengths of the four visible lines in the Balmer series. (26) In this experiment, Equation (25) will be used to determine R from measurements of λ. Using the known corresponding energy levels for the Balmer From knowledge of the wavelength values, you will be able to accurately calibrate the … ok value of the Rydberg constant, R H =1.17x10^7 ± .03 m^-1 Further calibration can lead to a Really Good value for the Rydberg constant: Bad Calibration gives: R H =1.21x10^7 ± .05 m^-1 2.4% improvement in accuracy Apparatus
On the same photographic plate, it appears, parallel to the hydrogen For the visible, Balmer series ni is 2 and values of nf will be matched to the observed spectral pattern. 3.
INTRODUCTION In this experiment, linear emission spectra of discharge tubes are studied. - Description of the procedure of identification of the unknown gas and statement about the gas. Rydberg constant, (symbol R∞ or RΗ ), fundamental constant of atomic physics that appears in the formulas developed (1890) by the Swedish physicist Johannes Rydberg, describing the wavelengths or frequencies of light in various series of related spectral lines, most notably those emitted by - Calculating resolution of the spectrometer with the yellow doublet of sodium spectrum. The discharge tube is Measuring the Rydberg Constant Introduction In this experiment, you will observe the visible wavelengths of light produced by an electric discharge in helium gas, using a diffraction grating. Figure 1. from which the Rydberg constant results: (),2 2 2 4 4 n H n n R − ⋅λ = .