As you move away from a lightsource

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Homework Help Overview

The discussion revolves around the behavior of light as one moves away from a light source, specifically focusing on the wavelength and its potential changes. The subject area includes concepts from wave physics and the Doppler effect.

Discussion Character

  • Exploratory, Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • Participants explore whether the wavelength of light changes with distance from the source, with some suggesting it remains constant while others introduce the concept of the Doppler effect to explain perceived changes.

Discussion Status

The discussion is ongoing, with participants sharing their thoughts and theories. Some have provided insights into the Doppler effect and its implications for wavelength and frequency, while others seek clarification on the concepts involved.

Contextual Notes

Participants are considering the implications of the Doppler effect and how it relates to the perception of light as one moves away from a source, indicating a need for further exploration of these concepts.

grantP
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As you move away from a lightsource...

Homework Statement


(from title)
...the wavelength of the light _______? (increase, stays the same, decrease, decrease in amplitude?)

Homework Equations





The Attempt at a Solution

 
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my guess would be the wavelength would stay the same, but I am not certain at all, anyone know?
 
explain why you believe it would stay the same.
 
well because wavelength is the distance between two successive points on waves right? well as you move away, the length dosent change, just the amount or possibly the frequency?
 
This is just a theory. Technically neither the frequency or wavelength change. But for the observer, if you account for the Doppler effect, light sources/stars moving away from the Earth appear to have a 'red shift' while those moving towards Earth have a 'blue shift'. Red light has a longer wavelength than blue light. Frequency appears to decrease, but speed of light remains the same.
 

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