Optics B/C

[foreverphysics]

Or you can make a flexible template that you can edit on-site. That's (kind of) what we did.

[SciBomb97]

As in flexible, you mean "weak enough to poke a hole through."

[foreverphysics]

No, I mean "flexible" as in we could draw new lines on the template in a matter of a minute or so.

[SciBomb97]

Well, you can do that on your template. You just haven't figured out the mechanism behind it yet.
I suggest you try using it on a laser shoot and reasoning out how it works. That's what I did.

[foreverphysics]

Well, if Mr. L would actually BRING the laser box once in a while, I might be able to. And also, you MADE the templates, so you should know better than anyone else.

[Seracon]

Hey guys, I have a question I had trouble with on my State Test; Image is attached.
Basically, with green and magenta lasers shining on a red bottle on a white table, what colors appear on the bottle when the laser hits the bottle, and the shadows behind; fill in the blank spots. Thanks!

[foreverphysics]

That's relatively simple; draw the kissing rays, and the rest will follow naturally.
Although, that question should really read "flashlight" and not "laser".

[Seracon]

That's relatively simple; draw the kissing rays, and the rest will follow naturally.
Although, that question should really read "flashlight" and not "laser".

You do realize that doesn't help a bit...

[foreverphysics]

Okay.
Kissing rays are rays from the light source that pass right over the edges of the object. From there on out, it's just simple color mixing, which I assume you know how to do.

[SciBomb97]

I think this is it, although I can't be sure...
Going clockwise from top left:

• Black (the bottle is red, so it reflects red light and absorbs green and blue light. If only green light is shining on that surface, then the surface appears black since it doesn't reflect green light)
• Red (magenta is constituted of red and blue light, and since the bottle only reflects the red light, that area will appear red)
• White? (or maybe green...the picture isn't very accurate about shadow lines)
• White? (or magenta...same reason)
• Black (that is the shadow's umbra, so it won't be illuminated directly by the light)

I'm hoping that wasn't an epic fail...but whatevs.