Register to reply

Distance a wave travels?

by Evil Bunny
Tags: distance, travels, wave
Share this thread:
Evil Bunny
#1
May7-12, 10:13 AM
P: 237
How far will a 1300 nanometer wave travel in 100 nanoseconds?

I know its simple but I can't remember how to do it...
Phys.Org News Partner Physics news on Phys.org
How did evolution optimize circadian clocks?
New webcast series brings cutting-edge physics talks to the world
High Flux Isotope Reactor named Nuclear Historic Landmark
Pengwuino
#2
May7-12, 10:42 AM
PF Gold
Pengwuino's Avatar
P: 7,120
It all depends on how fast this wave is going. Since you're considering an atomic scale wave, I'm guessing you're asking about light? How fast does light travel?
Evil Bunny
#3
May7-12, 10:45 AM
P: 237
Yeah its a laser... 1.44 refraction index

Pengwuino
#4
May7-12, 10:47 AM
PF Gold
Pengwuino's Avatar
P: 7,120
Distance a wave travels?

Okay you need to give the full description of the problem first, we can't guess at what the situation is.
Evil Bunny
#5
May7-12, 10:51 AM
P: 237
Ok sorry. Is that enough information?
takudo_1912
#6
May7-12, 11:27 AM
P: 10
what is "refraction index" :-s?
HallsofIvy
#7
May7-12, 11:40 AM
Math
Emeritus
Sci Advisor
Thanks
PF Gold
P: 39,682
Are you saying that you are talking about light traveling for 100 nanoseconds in a medium with refractive index of "1.44"? The refractive index, of some medium through which light can travel, is defined as the ratio of the speed of light in vacuum to its speed in the medium. Here, you are saying that
[tex]\frac{c}{v}= 1.44[/tex]
so that
[tex]v= \frac{c}{1.44}= .6944 c[/tex]
takudo_1912
#8
May7-12, 12:16 PM
P: 10
If this is so,are the problem necessary to know wavelength? because we knowed v=c/1.44
Evil Bunny
#9
May7-12, 01:34 PM
P: 237
So I guess wavelength is irrelevant? We know velocity and time, so I guess the wavelength never mattered in the first place...


Register to reply

Related Discussions
Varying the distance radio wave travels (Urgent) Electrical Engineering 14
Distance light travels in a relatively moving frame? Special & General Relativity 4
Finding the distance of a gamma ray travels in lead Introductory Physics Homework 0
Distance a rocket travels on a launch ramp Introductory Physics Homework 1
Distance ball travels question Introductory Physics Homework 7