Science Buddies: "Ask an Expert"

I have a few questions about a poject tha i want to do( in this project i want to use laser pointer but i dont have that much information to start it by myself ):
1- I was wondering if i mixe the red light with the yellow light it will give me a diffrent color, but what will happen if do the same thing with laser pointer....Will it change color or not?

2- not all laser pointer reflects in the air... and i want to know in witch model it does and why.


3- The last but not the least:
Can a laser pointer reflect in the air if it's light is like a torch or it does only when it's a line.

Can you help me ?

p.s.
sorry for bad english but i'm not a native english speaker.
if you dont understand what i'm trying to say just reply me so that i cuold tell in a better way.

Thaks for the interest.

Hi TheStudent,
It looks like you have some really great question there.
As a starting point, I would suggest that you try the search engine on science buddies with the keyword "laser". There are many interesting experiment with really good background information that you could incorporate into your own experiment.

For example:
https://www.sciencebuddies.org/science- ... =laser&p=1

And this is one of the project from the search result:
https://www.sciencebuddies.org/science- ... background

Please take a look and let us know if there's anything else that we can help to get you going on your experiment.
Good Luck!
Willey