On the same photographic plate, it appears, parallel to the hydrogen Using the known corresponding energy levels for the Balmer 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. (26) In this experiment, Equation (25) will be used to determine R from measurements of λ. Apparatus - Calculated Rydberg constant with its uncertainty. 3.

with the Rydberg constant R given by 4 8 23 e o me R εhc = .
from which the Rydberg constant results: (),2 2 2 4 4 n H n n R − ⋅λ = .

- Calculating resolution of the spectrometer with the yellow doublet of sodium spectrum. INTRODUCTION In this experiment, linear emission spectra of discharge tubes are studied. (12) Figure 2. Apparatus and setup for the Balmer series experiment. 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. - Description of the procedure of identification of the unknown gas and statement about the gas. Experimental set-up The hydrogen spectrum in the visible band is recorded on a photographic plate (spectrogram), which is set between two plexiglas plates. 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 The discharge tube is 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 For the visible, Balmer series ni is 2 and values of nf will be matched to the observed spectral pattern. Figure 1. From knowledge of the wavelength values, you will be able to accurately calibrate the …