Please follow the instructions to construct a refractometer and answer the corresponding questions.
The instructions below describe how to build a spectrometer. Here is a link if you wish to view the site where the instructions are from: https://www.youtube.com/watch?v=sVWWDevUtIs http://sci-toys.com/scitoys/scitoys/light/cd_spectroscope/spectroscope.html
Part 1. How to Make a Spectroscope
What you will need:
Our spectroscope has three main parts. There is a slit made from a razor blade to make a path for the light, a diffraction grating made from a CD disk, and a viewing port.
To construct your spectroscope, you need to put a slice in one side of the box at roughly a 30-degree angle. This will hold the CD. Place the CD in the slot to determine where to place the other two cuts. On the top of the box, cut a hole about half an inch to an inch square above the CD. On the side opposite the CD, make a very narrow slit opposite the CD. Alternatively, you can cut a larger slit and cover it with 2 pieces of foil to control the size of the slit. Spectroscope complete.
Once you have assembled your spectroscope with the instructions in the lecture and above, use it to examine the spectra of three different light sources. Make sure that at least one of them is the sun or moon, but the others can be incandescent lights, compact fluorescent bulbs, LED lights, halogen or xenon bulbs, televisions, computer screens, candles, fireplaces, for example. Aim the slit towards the light source you are investigating, then look through the viewing hole to see the spectrum on the disk.
Answer the following questions:
Part 2. Estimating the Number of Visible Stars in the Night Sky
For this, you will need an empty toilet roll and a clear, dark night. Before you start, jot down the number of stars that you think you can see in the night sky.
Aim your toilet roll at a part of the sky well above the horizon to avoid any haze pollution. Hold your roll steady and allow your eyes to get used to the light for a few seconds.
Count the number of stars that you can see within through the roll. Do this four more times in other parts of the sky, and average the five counts.
The viewing diameter of a toilet roll is about 1/135th of the entire sky, at least for a relatively flat area. Mountains, buildings, or large trees will obscure some of the sky. To determine the number of visible stars, multiply your average by 135.
Answer the following questions:
Part 3. Solar System
Answer the following questions:
Your paper should meet the following requirements:
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