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PH221-Lab1

# PH221-Lab1 - Data and Results Table 1 Finding the value of...

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Data and Results: Table 1: Finding the value of d using a Sodium lamp with a known wavelength Table 2: Determining the Wavelength of Three Colors at Four Order Numbers n color a (cm) up a (cm) down b (cm) up b (cm) down θ (degrees) up θ (degrees) down θ avg (degrees) sin θ λ (nm) 1 Yellow 76.7 76.7 20.0 20.0 14.6 14.6 14.6 .25 731.6 1 Orange 76.7 76.7 20.6 20.8 15.0 15.2 15.1 .26 760.9 1 Red 76.7 76.7 21.1 21.5 15.4 15.7 15.6 .27 790.1 2 Yellow 76.7 76.7 36.0 36.3 25.1 25.3 25.2 .43 629.2 2 Orange 76.7 76.7 37.8 37.5 26.2 26.1 26.2 .44 643.8 2 Red 76.7 76.7 39.0 39.9 27.0 27.5 27.3 .46 673.1 3 Yellow 76.7 76.7 55.0 55.4 35.6 35.8 35.7 .58 565.8 3 Orange 76.7 76.7 58.0 58.0 37.1 37.1 37.1 .60 585.3 3 Red 76.7 76.7 60.6 61.1 38.3 38.5 38.4 .62 604.8 4 Yellow 76.7 76.7 81.5 81.7 46.7 46.8 46.8 .73 534.1 4 Orange 76.7 76.7 87.7 88.2 48.8 49.0 48.9 .75 548.7 4 Red 76.7 76.7 96.3 95.7 51.5 51.3 51.4 .78 570.6 n a (cm) up a (cm) down b (cm) up b (cm) down θ (degrees) up θ (degrees) down θ avg (degrees) sin θ d (nm) 1 86.7 86.7 22.0 21.8 14.2 14.1 14.15 .24 2455.4 2 86.7 86.7 39.5 40.0 24.2 24.8 24.5 .41 2874.6 3 86.7 86.7 60.5 61.0 34.9 35.1 35.0 .57 3101.6 4 86.7 86.7 89.4 90.7 45.9 46.3 46.1 .72 3273.9 d avg (nm) = 2926.4

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Julia Bielaski 0163140 Lab Report #1 PH 232
Objective : This lab was designed to analyze the wave nature of light. The first part of the experiment was used to find d (the grating spacing) since the wavelength was known. We recorded four diffracted images from the sodium lamp, meaning the order number was four. The second component of the lab used the grating spacing from part one to find the wavelengths of each color for every order visible. A spectrum tube replaced the sodium lamp and we used the colors yellow, orange, and red for our data. Method : -Average wavelength of the sodium lamp λ a = c/f a = ch/(E 3 -E 1 )= 5896.0 A= 589.6 nm E 3 : The higher energy level that the electron jumps to.

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PH221-Lab1 - Data and Results Table 1 Finding the value of...

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