How Does Phase Reversal Occur in Light and Sound Wave Reflections?

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The discussion revolves around the phenomenon of phase reversal in light and sound wave reflections, particularly focusing on how these waves behave when they encounter different surfaces.

Discussion Character

  • Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • Participants explore the concept of phase shifts in waves, questioning the meaning of "inverted" in the context of light and sound reflections. Some discuss the conditions under which phase shifts occur, particularly in relation to the index of refraction for light waves and the nature of surfaces for sound waves.

Discussion Status

There is an ongoing exploration of the definitions and implications of phase shifts, with some participants clarifying their understanding of the term "inverted." The discussion includes various interpretations of how phase shifts apply to different materials and types of waves.

Contextual Notes

Participants seem to assume a foundational understanding of wave behavior, but there are indications of differing levels of familiarity with the concept of phase shifts, particularly in relation to specific materials.

yaffle
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I know that waves on a string are inverted on reflection from a hard surface. How about light waves and sound waves?
 
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yaffle said:
I know that waves on a string are inverted on reflection from a hard surface. How about light waves and sound waves?


I don't unserstand what u could possbly mean by 'inverted',but i can tell you that sound and light waves get a phase shift by [itex]\pi[/itex] radians on each reflection.

Daniel.
 
Light reflecting from a material of higher index of refraction will get phase shifted by [itex]\pi[/itex] radians (thus "inverted"), but light reflecting from a material of lower index of refraction will not get phase shifted.

Sound waves reflecting from a hard surface will get phase shifted by [itex]\pi[/itex] radians.
 
Thanks:
Sorry I thought everyone would be familiar with the concept of a phase shift of pi radians as being "inverted"
however,
I guess this means that light reflected from a mirror or any object eg. an apple is phase shifted by pi radians?
 
yaffle said:
Thanks:
Sorry I thought everyone would be familiar with the concept of a phase shift of pi radians as being "inverted"
however,
I guess this means that light reflected from a mirror or any object eg. an apple is phase shifted by pi radians?

Exactly! :-)
 

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