Science Buddies: "Ask an Expert"

I just started this science project. I found the formula, but I'm not sure how to measure the angles. Can someone help me. with this?

Cjjl4 wrote:I just started this science project. I found the formula, but I'm not sure how to measure the angles. Can someone help me. with this?

Hi Cjjl4,

I am aware that refractive index of a certain substance is measuring the speed of light in that substance.

What angles are you trying to measure? What is your project about in relation to refractive index? What would be your vacuum and medium?

Please be a little more specific in what angles you are measuring with your project concerning gelatin.

After you do so, it would be more clear for me to help you out.

Thanks,
Grace

Hi,

This is a great, but challenging project. Grace 7177 has asked some good questions that should help you get started. Here are some additional suggestions.

I think you are doing this project:

https://www.sciencebuddies.org/science- ... p009.shtml

When you pass the laser light through the gelatin or other medium, the light is bent at an angle according to Snell's law. The best place the start on this project is with all of the background reading, including the example problems give in one of the sites. Once you have understood how to apply Snell's law, then you should be able to set up the experiment. You will be measuring the refraction of the angle of the light as it passes from air into the gelatin using a protractor.

Many science buddies projects include detailed step-by-step protocols to follow, but this one is completely open ended and you will have to design your own experiment. Some possibilities include adding sugar or salt to the gelatin, or comparing results of different clear substances listed on the table.

I hope this helps. Let us know if you have any other questions.


Donna Hardy

Thank you so much for your help!
Thanks for clearing up my confusion.