a prism
It does. The light refracts when it enters one side of the glass, and then it refracts in the other direction when it leaves the other side and goes back into air. The slab of glass doesn't distort the image, because its surfaces are flat and parallel. So light leaves the glass in very nearly the same direction as it was headed when it arrived.
you have to input the same direction anywhere twice
True.
No, the amount a lens refracts light depends on its material and curvature. A less curved lens will refract light less than a more curved lens if they are made of the same material. The refractive index of the material and the curvature of the lens both play a role in determining the amount of refraction.
The earth's atmosphere refracts the light of the sun like a prism, It also appears to get bigger for the same reason.
No, light is energy, wind is molecules on the move.
If the nipple is large enough, then it is possible to pierce one nipple twice in the same direction. I would suggest you talk to your local professional body piercer, they can have a look and tell you if there is enough tissue to support a second piercing.
Water is not a prism. A prism is a transparent object that refracts, reflects, and disperses light, while water is a compound made up of molecules. Water can refract light but does not have the same properties as a prism.
Yes, if they are the same type of lights, having twice as many lumens gives you twice as much light, regardless of how many lights you need.
No, they sum up to twice one of the forces.
Reflection: When light is bounced back off a surface in different or same direction Deflection: When light goes through a surface but its direction has changed from before it hit the surface
Polarized light has all its electromagnetic waves vibrate in the same direction. This results in the light waves oscillating in a specific orientation, which can block certain orientations from passing through filters that selectively allow light waves aligned in a particular direction to pass.