Light reflection by traffic light after rain

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SUMMARY

The discussion centers on the optical phenomena observed when a red traffic light reflects on a wet road surface after rain. The user seeks to understand why the red light appears smeared across the ground, prompting insights into the principles of reflection. Key concepts include the distinction between diffuse and regular reflection, as well as the role of water in creating reflective surfaces. The user hints at the relevance of the law of reflection, where the angle of incidence equals the angle of reflection.

PREREQUISITES
  • Understanding of optical properties, specifically reflection and refraction.
  • Familiarity with the concepts of diffuse and regular reflection.
  • Knowledge of the law of reflection (Theta incidence = Theta reflection).
  • Basic principles of how water interacts with light.
NEXT STEPS
  • Research the differences between diffuse reflection and specular reflection.
  • Explore the optical properties of water as a reflective surface.
  • Investigate the effects of surface irregularities on light reflection.
  • Learn about the physics of light behavior in various environmental conditions.
USEFUL FOR

Photographers, physics students, and anyone interested in the optical effects of light on wet surfaces will benefit from this discussion.

blumfeld0
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Hi. I need to write up a short one paragraph on a picture I took-- I just need hints or suggestions so I can go and research the effect myself. Any insights would be greatly appreciated.


I have a picture of a traffic light (red). The ground is wet after rain. The red light is smeared out all over the ground. Hope this makes sense.
Here is a similar picture I found online.
http://blog.nj.com/ledgerupdates_impact/2008/09/large_02gustavek.jpg

Can someone explain this phenomena?

Thank you.
 
Last edited by a moderator:
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Here's a hint. What optical properties would the street have to have in order for you to see a non-smeared image of the light?
 
Hum. Are you trying to get me to think about the difference between diffuse reflection-irregularities and impurities in the road- and regular
reflection. I know Theta incidence = theta reflection.
The water acts like a mirror? or lens? and create an inverted image right?
I could get be wrong here.
 

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