Optics B/C

[MattChina]

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?

[UTF-8 U+6211 U+662F]

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!

[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.

[UTF-8 U+6211 U+662F]

A beam of light enters a transparent prism from the air and refracts as shown in the diagram to the right. Find angle Y.

Click to Show Answer

sin 59 = 1.5 sin (90-x)

X = 90 - arcsin(sin 59 / 1.5)

Y = 120 - X = 65 deg

[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.

Click to Show Answer

sin 59 = 1.5 sin (90-x)

X = 90 - arcsin(sin 59 / 1.5)

Y = 120 - X = 65 deg

Correct. Your Turn.

[UTF-8 U+6211 U+662F]

The ___ approximation is a small angle approximation used in __ optics (sorry, a little bit vague) and ray tracing.

Hint 1 (Click to Show Hidden Text)

First blank means hitting close to the optical axis

Hint 2 (Click to Show Hidden Text)

Second blank refers to a mathematician

[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?

[UTF-8 U+6211 U+662F]

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?

Click to Show Answer

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

[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."

[Adi1008]

Restarting...

Explain the joke in a license plate that says "If this appears blue, you are going too fast."

Answer (Click to Show Hidden Text)

Doppler effect. When you're moving towards an object (or it's moving towards you) the wavelengths become shorter (appear bluer)