LAB REPORT FOR MP7 EXPERIMENT

# LAB REPORT FOR MP7 EXPERIMENT - Average diffraction angle...

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LAB REPORT FOR MP7 EXPERIMENT: Atomic Spectroscopy VI-1 Wavelengths of Balmer Lines of Hydrogen Red Light: θ LEFT =23.5˚ , θ RIGHT =23.5˚ Average diffraction angle for Red: θ AVG =23.5˚ Green Light: θ LEFT =17˚ , θ RIGHT =17˚ Average diffraction angle for Red: θ AVG =17˚ Wavelengths of Red and Green lights can be measured using equation: Where d =16667 Å = 16667 x 10 -10 m Thus, ? RED EXP = 664.59nm And ? GREEN EXP = 487.29nm VI-2 Now we calculate the wavelengths of Red and Green Balmer Lines using the Equation: Where n = 3 for red and n = 4 for green Thus wavelength of Red Balmer Line, ? 3 CALC. = 652.01nm And wavelength of Green Balmer Line, ? 4CALC. = 482.97nm VI-3 Percent difference between calculated and experimental values for red line = 1.92% Percent difference between calculated and experimental values for green line = 0.93% VI-4 For m=1 Sodium Yellow D-line: θ LEFT =21˚ , θ RIGHT =21˚

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Unformatted text preview: Average diffraction angle for Red: θ AVG =21˚ Wavelengths of Sodium Yellow D-line can be measured using equation: Where d =16667 Å = 16667 x 10-10 m Thus, ? EXP = 597.29nm Now for Sodium Yellow D-line of order m=1 theoretical wavelengths are ? 1 = 5889.95 Å and ? 2 = 5895.92 Å Thus average theoretical/calculate ? CALC. = 589.29nm The difference between experimental and calculated wavelengths is 1.35% VI-5 For Red Wartten Filter Cut off angles: θ LEFT =20.5˚ , θ RIGHT =20.5˚ Average diffraction angle for Red: θ AVG =20.5˚ Wavelengths of Sodium Yellow D-line can be measured using equation: Where d =16667 Å = 16667 x 10-10 m Thus, ? CUT-OFF = 583.69nm VII-1 Equation 5: Now σ ? depends on value of θ VII-2 VII-3 For a given wavelength ? , the maxim order of diffraction m max which can be observed is m=5...
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LAB REPORT FOR MP7 EXPERIMENT - Average diffraction angle...

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