Overhead Projectors

Okay so I have a science research project (SRP) it’s this whole big thing where I pick a topic or question and have to do an experiment.

Well my project is "how does the color of light affect the absorption of heat?"

I’m going to get 4 groups of four plastic cups of water. I’m going to have one lamp with regular light shining on them. Then, somehow I’m going to change the color of light of 3 of the groups. The colors I’m using: red, green, and blue. My question is, how do I change the color of light without changing the light bulb?

I don’t want to use four different light bulbs because that means four different same brand lamps and I don’t have that. My teacher put a comment on my paper saying that I have to have all of this running at the same time. Not at different times.

Now my question for you is, how do I change the color of light without changing the light bulb?

I wanted to use those transparency sheet teachers use for Overhead Projectors, but I went to staples and there was this HUGE pack and it was $30 or so. I only need 4. (clear, red, green, blue)

I’m really lost on what to do. Plus I have to take pictures of my set up and that’s due in two weeks or so and I really want to know how to do this. Plus I have to get my materials and procedures accepted before I can start experimenting. HELP?!?!?!?!?!

-Jasmine
Sorry if it’s kind of confusing. There’s so much more information, but I couldn’t write all of that haha

You might try getting plastic wrap like Saran wrap or Glad, and coloring it with Magic Markers. I don’t know if it would work but try it?

I don’t know want to use them on Overhead Projectors. I need it to change the color of light for a science project. I need blue, green, and red. Purple is okay too instead of blue.

I know there’s a Michaels and AC Moore where I live. There’s Office Depot and Staples, as well. Help?

-Jasmine
oh they’re like thin plastic sheets.
are you sure they have them?

ya

Michael’s
Office depot and Staples
and there is this store called The Teacher Store or whatever. that’s were the teachers get there class room stuff at

I have an Overhead Projector in my classroom. Is there a way to switch the computer screen off and leave the LCD projector on? I want to show a PowerPoint and then check my e-mail or grades, but I don’t want the whole class to see and I don’t want to keep turning the projector on and off.

Some projectors have a mute button or an option to switch to another channel. Both of them make it easy to go back and forth.