Additive color mixing

OK so a few weeks ago I was thinking that In science they use to always tell us red blue and green light makes white.
and they would show us a diagram like this.

And some times they would get some flashlights and attend to create it witch never really worked.
Then it dawned on me that other than a computer or tv screen I never have actually seen a working example.
so I decided to build one.

So i projected a red a blue and a green laser on a piece of paper and then I used a lens to re-project that image on another sheet on the oposit side of the lasers and here is the result


Unfortunately that was fuzzy.
and because of my lens-holder the dots were not perfectly round
So I grabbed a lens with a metal casing on it and got took some more shots with my dads camera to try to get a better image.


To my surprise the camera picked up the magenta in the center as tan


But I was not done yet I wanted to try something I saw in physics last year
making a three colored shadow

:drool::drool::drool::drool:

Here is a picture of the lens holder from the first shot
to see what made those divets


I hope you like it.
It took me a few weeks a couple minutes a day to set up.

That shadow picture is real cool!

edit: what the heck? nobody even replied?

Woah, awesome pics. What were the three lasers you used to get that balance?

The musings of a mad scientist are not always appreciated for their beauty

Peace,
dave

Tanks guys I have better pics of this but never uploaded since no one replied time to upload.

2007Revolution said:

Woah, awesome pics. What were the three lasers you used to get that balance?

Click to expand...

They were 473nm 532nm and 650nm

Really nice work!
The pencil shot is outstanding. This is the kind of thing I'm getting back into lasers for.

I love how the pencil shadow shot casts shadows of the secondary colors. Magenta, Cyan and Yellow.

+1 cool.

More pics anyone :drool:

In these I used the hole front element from my telescope even the aluminum housing. This was to get rid of those divots and give nice clean circles.