What was the initial polarization direction of the incident light?

Click For Summary

Homework Help Overview

The problem involves two polarizers oriented at 40 degrees to each other and the transmission of plane-polarized light through them, with a focus on determining the initial polarization direction of the incident light based on the percentage of light that passes through.

Discussion Character

  • Exploratory, Mathematical reasoning

Approaches and Questions Raised

  • The original poster attempts to apply Malus's Law to find the initial polarization direction, expressing uncertainty about the process. Other participants suggest considering the angle of polarization relative to the first polarizer and calculating the transmission through both polarizers.

Discussion Status

Participants are actively engaging with the problem, with one member reporting a calculated angle of 59.6 degrees after applying the law. There is a positive response to this attempt, indicating a supportive environment for exploration.

Contextual Notes

No specific constraints or missing information are noted, but the discussion revolves around the application of Malus's Law and the interpretation of angles in the context of polarizers.

xQuin
Messages
3
Reaction score
0

Homework Statement


Two polarizers are oriented at 40deg to each other and plane-polarized light is incident on them. If only 15% of the light gets through both of them, what twas the initial polarization directon of the incident light?


Homework Equations





The Attempt at a Solution


I think it ha something to do with Malus's Law but I'm not sure exactly how
 
Physics news on Phys.org
welcome to pf!

hi xQuin! welcome to pf! :wink:

yes, assume that the angle of polarization to the first polarizer is θ …

how much goes through the first polarizer, and how much of that goes through the second?

show us what you get :smile:
 
Thanks tim, I applied the law twice and managed to get an answer of 59.6deg =D
 
looks good! :smile:
 

Similar threads

  • · Replies 7 ·
Replies
7
Views
3K
  • · Replies 25 ·
Replies
25
Views
4K
  • · Replies 1 ·
Replies
1
Views
2K
  • · Replies 3 ·
Replies
3
Views
6K
  • · Replies 1 ·
Replies
1
Views
2K
  • · Replies 3 ·
Replies
3
Views
3K
  • · Replies 5 ·
Replies
5
Views
2K
  • · Replies 6 ·
Replies
6
Views
2K
Replies
6
Views
2K
Replies
10
Views
3K