Question

Light will bend as it

slows down in space.
speeds up in space.
changes speeds
passes from one medium to another.
there are 2 answers i think i know one of them which is d

Answer 1

@inkyvoyd

Answer 2

@linn99123

Answer 3

@TheEdwardsFamily

Answer 4

@Demonx341

Answer 5

sorry just asking for more people to come

Answer 6

It's fine. I'm just a little confused with this question :P

Answer 7

me too

Answer 8

i only ask a question if im really confused

Answer 9

We have two kinds of light speed: the speed of photons C whose flight path is unencumbered and the average speed of photons c < C whose flight path is encumbered by particles. The average speed through media filled with particles is slower than the speed without particles in the way because of dwell time, d.

As photons couple with electrons of the media, they are destroyed and their energy raises the electron energies. New photons emerge when the electrons pop back to a lower energy level. All that processing, that coupling and uncoupling, takes time, dwell time.

So if space S is crossed in t = S/C time without particles to couple with, the total time to cross S with dwell time will be T = SUM(d) + t > t. It simply takes more time on average to cross the same space S when the space is filled with stuff to run into.

And there we are: c = S/T < S/t = C so that the average speed through a medium will always...always...be slower than through a vacuum, space without particles to run into. And not all media are created equal.

Some will have more particles, some will have less, some will be more inclined to couple, some will be less. So we find that some material, like air, has average speed c that's almost the same as C. And of course, lots of things are totally opaque; so the speed is c = 0.

NOTE: We know that light bends when going through lenses and such; but we really don't know why. In HS we were taught a myth that wave fronts had to stay together and that's why the rays bent, to keep the wave fronts together as they go from medium to medium. But that turns out to be a myth; there is absolutely no physical reason why wavefronts must stay intact.

In fact the concept of rays of light is faulty. To date the best we can come up with that sort of makes physical sense is the sum of all probable paths. When we do the math, really heavy math, the vectors do form what we can define as rays of light.

Answer 10

Got that from yahoo answers. It might help you

Answer 11

yea i saw just didnt read it but i'll read it know

Answer 12

Ok. :D

Answer 13

thank you

Answer 14

D should be right tho

Answer 15

You're welcome! ^_^

Answer 16

i think it might be C. it changes speed because of this part
We have two kinds of light speed: the speed of photons C whose flight path is unencumbered and the average speed of photons c < C whose flight path is encumbered by particles.

Answer 17

what do you think

Answer 18

hm...yeah I suggest c too. Makes sense.

Answer 19

okay thank

Answer 20

you welcome! Medal 4 you 2 :P

Answer 21

why and thank you -_O

Answer 22

Lol because you were figuring it out too

Answer 23

okay well thank you

Answer 24

np c;

Answer 25

if i have another question can you help

Answer 26

Sure! I'll try

Answer 27

kk

Answer 28

Just tag me if you need me :)

Answer 29

kk