Young's Modulus Experiment With a Glass Screen

Click For Summary
The discussion centers on the impact of a glass screen on the interference pattern in a Young's modulus experiment. It highlights that the phase difference between two wave sources, S1 and S2, changes due to the longer path taken by the wave through the glass. This alteration results in a shift of the fringe pattern, moving it towards a specific direction, identified as Y. The conversation also touches on the comparison of wavelengths of light traveling through glass versus air, which is crucial for understanding the observed shifts. Overall, the experiment emphasizes the effects of medium on wave behavior in interference patterns.
Jeremy Feng
Messages
1
Reaction score
0

Homework Statement


upload_2018-10-6_15-40-46.png


Homework Equations



Path difference is nλ at maxima, (n+0.5)λ at minima

The Attempt at a Solution



I think the phase difference between S1 and S2 is not 0 anymore, because the wave effectively takes a longer distance by going through S2. Thus, there is no longer a central maxima at O.

This means the whole fringe pattern shifts, however why is it towards Y?
 

Attachments

  • upload_2018-10-6_15-40-46.png
    upload_2018-10-6_15-40-46.png
    15.7 KB · Views: 1,067
Physics news on Phys.org
Consider the number of wavelengths of the light as it passes thru the glass
as compared to the number of wavelengths of light as it passes thru
an equivalent thickness of air.
 

Thread 'Magnitude of buoyant force in fluids of different densities'

The book claims the answer is that all the magnitudes are the same because "the gravitational force on the penguin is the same". I'm having trouble understanding this. I thought the buoyant force was equal to the weight of the fluid displaced. Weight depends on mass which depends on density. Therefore, due to the differing densities the buoyant force will be different in each case? Is this incorrect?
View full post »

Similar threads

Second bright fringe in Young's Experiment
  • · Replies 3 ·
Replies
3
Views
1K
Finding the angular spread of a diffraction minima?
  • · Replies 1 ·
Replies
1
Views
3K
Double slit experiment with a glass-covered slit of unknown n
  • · Replies 3 ·
Replies
3
Views
6K
Thomas Young's double slit experiment
  • · Replies 6 ·
Replies
6
Views
4K
Fraunhofer Diffraction Pattern Ratio of Power Densities
  • · Replies 34 ·
2
Replies
34
Views
3K
Diffraction Grating: Possible variables for Experiment
  • · Replies 5 ·
Replies
5
Views
2K
Hair/wire laser diffraction interference pattern
  • · Replies 5 ·
Replies
5
Views
4K
Path difference in an interference device
  • · Replies 11 ·
Replies
11
Views
3K
Young's interference experiment problem
  • · Replies 2 ·
Replies
2
Views
4K
Double slit problem with glass block
  • · Replies 2 ·
Replies
2
Views
10K