Please, help with the experimental setup

In summary, to use the spectrometer on the photo to measure an atomic spectrum, you will need a discharge tube filled with gas as a source. One telescope will point at the source and the other will be used to observe. The prism on the black tray needs to be adjusted to refract the beam into the second telescope. The reticule in the observation scope may need to be calibrated with a known spectrum, and the other arm may have an attachment for the gas discharge tube. The prism is fixed, but the rotary stage can be used to center each spectral line and record its intensity and color. From there, the wavelengths can be calculated using the calibration and experimental geometry. It is helpful to have a partner when using this instrument.
  • #1
Virous
68
0
Hello

Can someone, please, briefly describe or give a manual on how to use the spectrometer on the photo to measure an atomic spectrum. I tried to google that already, but failed.

http://www.daviessports.co.uk/netalogue/600/A46395.jpg

Deep thanks!
 
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  • #2
You will need a source to look at. A discharge tube, filled with a gas may do the job.
One of the two telescopes will point at your source and you look through the eye-piece of the other telescope. The prism stays on that black tray in the center and you need to adjust it so the refracted beam goes into the second telescope. At least this is how it looks to me from the picture.
 
  • #3
Prism separates the wavelengths; ther may be a reticule in the observation scope which needs to be calibrated with some known spectrum; the other arm perhaps has an attacment for the gas disharge tube - otherwise you must align this with the light source, and darken the room.

The prism is fixed; use the rotary stage to center each spectral line, and note its intensity, color, etc, and record the angle.

After that you can calculate the wavelengths from the calibration plus the experimental geometry.

I remember optics labs where we had to figure out the instrument with no instructions, and had to do our own calibrations. Its good to have a partner!
 

1. What is the purpose of an experimental setup?

An experimental setup is used to test a hypothesis or investigate a scientific question. It allows scientists to manipulate variables and observe the effects, ultimately leading to a better understanding of a phenomenon.

2. How do I design an experimental setup?

To design an experimental setup, you must first identify the variables that you want to test and control. Then, you will need to determine the appropriate equipment and materials needed to manipulate these variables and collect data. It is important to also consider any potential confounding variables and how to control for them.

3. What are the key components of an experimental setup?

The key components of an experimental setup include the independent variable (the variable being manipulated), the dependent variable (the variable being measured), control variables (variables that are kept constant), and a control group (a group that does not receive any manipulation). It is also important to have a clear procedure for conducting the experiment and recording data.

4. How can I ensure the accuracy of my experimental setup?

To ensure the accuracy of an experimental setup, it is important to carefully control all variables except for the independent variable. This can be done through proper measurement techniques, using reliable equipment, and repeating the experiment multiple times to ensure consistency. It is also important to analyze the data critically and consider any potential errors or biases.

5. What are some common mistakes to avoid in an experimental setup?

Some common mistakes to avoid in an experimental setup include failing to control all variables, not having a large enough sample size, and not properly recording and analyzing data. It is also important to be aware of any potential biases, such as experimenter bias or selection bias, and to take steps to minimize their impact on the results.

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