Newton's Rings: Darker or Brighter Central Spot?

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Discussion Overview

The discussion revolves around the phenomenon of Newton's rings, specifically questioning whether the central spot appears darker or brighter. Participants explore the formation of these rings and the implications of light transmission at the contact point, delving into the underlying physics and interpretations of the observed effects.

Discussion Character

  • Exploratory, Conceptual clarification, Debate/contested

Main Points Raised

  • One participant questions whether the central spot in Newton's rings is darker or brighter, prompting further exploration of the topic.
  • Another participant seeks clarification on the phrase "transmission at contact point," indicating confusion about its meaning in the context of ring formation.
  • A different participant suggests that the term may refer to the method of creating the rings, hinting at the role of light transmission in the observed patterns.
  • There is mention of a phase shift of 180° due to the thin layer of air at the contact point, which is proposed as a reason for the dark central spot.

Areas of Agreement / Disagreement

The discussion remains unresolved, with participants expressing differing interpretations of the central spot's appearance and the implications of light transmission at the contact point.

Contextual Notes

Participants express uncertainty regarding the terminology used and the underlying physics, particularly concerning phase shifts and their effects on the observed patterns.

oreo
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If light is transmitted at a point of contact in Newton's rings. The central spot will be darker or brighter?
 
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If you understand how Newtons rings are formed, what do you think and why?
 
CWatters said:
If you understand how Newtons rings are formed, what do you think and why?
Actually I can't understand what the word "transmission at contact point" here means. I know that there is thin layer of air at contact point due to which there is phase shift of 180° which results in dark point at mid.
 

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