Light Interference Webassign question


by nickredsox
Tags: interference, light, webassign
nickredsox
nickredsox is offline
#1
Nov29-08, 08:21 PM
P: 4
1. The problem statement, all variables and given/known data

Light of wavelength 525 nm is used to illuminate normally two glass plates 26 cm in length that touch at one end and are separated at the other end by a wire of radius 0.03 mm. How many bright fringes appear along the total length of the plates?

2. Relevant equations

2*t=(m+1/2)*wavelength

3. The attempt at a solution
I thought t would be .6 since that would be the diameter. Then I solved for m and got 228. However webassign doesn't like this answer and im not really sure how to go about this problem
Phys.Org News Partner Science news on Phys.org
Lemurs match scent of a friend to sound of her voice
Repeated self-healing now possible in composite materials
'Heartbleed' fix may slow Web performance
Doc Al
Doc Al is offline
#2
Nov30-08, 07:09 AM
Mentor
Doc Al's Avatar
P: 40,872
You solved for the maximum value of m, but realize that m starts at zero.
nickredsox
nickredsox is offline
#3
Nov30-08, 12:11 PM
P: 4
im not really understanding because if i solve for t when m=0 if i plug it back in and solve for m im just going to get 0

Doc Al
Doc Al is offline
#4
Nov30-08, 12:34 PM
Mentor
Doc Al's Avatar
P: 40,872

Light Interference Webassign question


You're missing my point. The values of m: 0, 1, 2, 3, 4... If the maximum value of m = 4 (pretend), then how many values of m are there?
nickredsox
nickredsox is offline
#5
Nov30-08, 12:48 PM
P: 4
there would be five. so for my answer it should be one more than the answer i already got (228)?
Doc Al
Doc Al is offline
#6
Nov30-08, 12:49 PM
Mentor
Doc Al's Avatar
P: 40,872
That's what I would put.
nickredsox
nickredsox is offline
#7
Nov30-08, 12:51 PM
P: 4
thank you a lot it worked


Register to reply

Related Discussions
Question about light and interference General Physics 2
Light interference question Introductory Physics Homework 2
interference of light Introductory Physics Homework 6
Light interference Introductory Physics Homework 2