UTF-8 U+6211 U+662F wrote:Restarting this... Why do light waves undergo specular reflection when hitting a mirror but diffuse reflection when hitting a piece of paper?
Becuase the mirror is flat and the paper is not?
Re: Optics B/C
Posted: March 14th, 2018, 7:27 pm
by UTF-8 U+6211 U+662F
MattChina wrote:
UTF-8 U+6211 U+662F wrote:Restarting this... Why do light waves undergo specular reflection when hitting a mirror but diffuse reflection when hitting a piece of paper?
Becuase the mirror is flat and the paper is not?
Sure. Your turn!
Re: Optics B/C
Posted: March 14th, 2018, 7:33 pm
by MattChina
A beam of light enters a transparent prism from the air and refracts as shown in the diagram to the right. Find angle Y.
Re: Optics B/C
Posted: March 14th, 2018, 7:54 pm
by UTF-8 U+6211 U+662F
MattChina wrote:
A beam of light enters a transparent prism from the air and refracts as shown in the diagram to the right. Find angle Y.
sin 59 = 1.5 sin (90-x)
X = 90 - arcsin(sin 59 / 1.5)
Y = 120 - X = 65 deg
Re: Optics B/C
Posted: March 15th, 2018, 3:18 pm
by MattChina
UTF-8 U+6211 U+662F wrote:
MattChina wrote:
A beam of light enters a transparent prism from the air and refracts as shown in the diagram to the right. Find angle Y.
sin 59 = 1.5 sin (90-x)
X = 90 - arcsin(sin 59 / 1.5)
Y = 120 - X = 65 deg
Correct. Your Turn.
Re: Optics B/C
Posted: March 15th, 2018, 4:15 pm
by UTF-8 U+6211 U+662F
The ___ approximation is a small angle approximation used in __ optics (sorry, a little bit vague) and ray tracing.
First blank means hitting close to the optical axis
Second blank refers to a mathematician
Re: Optics B/C
Posted: March 23rd, 2018, 2:37 pm
by Etan
Here's a question:
If person A is standing 11.25 ft away from a mirror, how far away will there image be?
How far away would person B's image be if they stood 28 ft behind person A?
If the mirror was a concave mirror what would happen to person B's image?
if the mirror was a convex mirror what would happen to person A's image?
I know that it's basically 4 questions and that it's pretty simple but hey, what are ya gonna do?
Re: Optics B/C
Posted: March 23rd, 2018, 5:02 pm
by UTF-8 U+6211 U+662F
Etan wrote:Here's a question:
If person A is standing 11.25 ft away from a mirror, how far away will there image be?
How far away would person B's image be if they stood 28 ft behind person A?
If the mirror was a concave mirror what would happen to person B's image?
if the mirror was a convex mirror what would happen to person A's image?
I know that it's basically 4 questions and that it's pretty simple but hey, what are ya gonna do?
1) 22.5 ft
2) 50.5 ft from A, 78.5 ft from B
3) If past one focal length, it would be inverted, real, and smaller. If within one focal length, it would be upright, virtual, and larger.
4) Upright, virtual, smaller
Re: Optics B/C
Posted: March 31st, 2018, 6:13 pm
by UTF-8 U+6211 U+662F
Restarting...
Explain the joke in a license plate that says "If this appears blue, you are going too fast."
Re: Optics B/C
Posted: April 3rd, 2018, 5:50 pm
by Adi1008
UTF-8 U+6211 U+662F wrote:Restarting...
Explain the joke in a license plate that says "If this appears blue, you are going too fast."
Doppler effect. When you're moving towards an object (or it's moving towards you) the wavelengths become shorter (appear bluer)
