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Laser Mirror First
Physics help about lasers?
I have a physics problem that I think is impossible. There is a square room with one wall missing on the bottom (from a top view) and the other walls are mirrors. There is a laser at the midpoint of the side with no wall. On the wall to the right at the midpoint, there is a target. I want to shoot the laser to the wall at the left and one-bounce it to the target. I'm supposed to use trigonometry to figure out the angle at which it was fired. I'm not give any measurements. To do what I want, the laser needs to be fired less than a quarter of the way up the left wall, which introduces a ton of ambiguity.
I've tried drawing triangles but because I don't know the measurement of the point at which the laser first bounces, so I don't think I can figure it out. I'm sorry if this is confusing. If anyone knows anyway of figuring this out, like a formula or something, please let me know. Thanks.
You want it to go all the way to the left wall then reflect back to the right wall (horizontal distance of 1.5 times the length of a side), while going 0.5 times the length of a side (vertical).
So the angle needs to be:
angle = sin^-1{(0.5)/(1.5)}
sin^-1 (1/3) = 19.47 degrees (up from left)
It'll hit the left wall 1/6th of the way up.
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Laser harp: first notes played
help with telescope collimation?
can anyone help please, ive recently bought an 11" dobo second hand and the images were very dissapointing, a colleague at work has lent me a laser collimating tool to collimate the mirrors, when first using the laser i found that the beam was totaly missing the secondary mirror, i have managed to get the beam going back up the laser tube by adjusting the primary mirror but the laser is not striking the center of the primary,{ it wasnt before i adjusted it either}. now looking down the focusing tube the reflection of the secondary mirror looks like i can see the part of the secondary mirror cell. help please !
You should re-post this question in the forums on www.astromart.com
Collimating is tricky at first, but don't give up, you'll get it eventually.
I've foud this site very helpful:
http://web.telia.com/~u41105032/kolli/kolli.html
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