- #1
samsam
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Let " d" equal the speed of dark
d = SQRT( e/m ) + 1
I am at a loss can anyone help me !
d = SQRT( e/m ) + 1
I am at a loss can anyone help me !
The Speed of Dark: Finding d with e/m
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Homework Help Overview
The discussion revolves around the concept of the "speed of dark" and its relationship to the speed of light, as well as the equations involving permittivity and permeability in a vacuum. Participants are exploring the implications of these concepts in a challenge context.
Discussion Character
- Exploratory, Conceptual clarification, Assumption checking
Approaches and Questions Raised
- Participants are questioning the validity of the term "speed of dark" and discussing the nature of light and darkness. There are references to equations related to the speed of light and attempts to relate them to the original equation presented. Some participants express confusion and seek clarification on the concepts involved.
Discussion Status
The discussion is ongoing, with various interpretations being explored. Some participants have provided insights into the nature of light and darkness, while others are seeking further clarification on specific terms and concepts. There is no explicit consensus yet, but the conversation is developing with multiple lines of inquiry.
Contextual Notes
Participants are grappling with the definitions and implications of the terms used, particularly in relation to homework constraints and the challenge context. There is mention of a specific experiment related to slowing down light, but details remain unclear.
- #2
samsam
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Please someone help ! its for a challenge Samssin
- #3
blochwave
- 288
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There's really no such thing as the "speed of dark", light is actually something, and the speed of light is the speed of that something. Dark is the lack of light.
The speed of light can be given as c=1/sqrt(e*u) where e and u are the permitivity and permeability of a vacuum(I forget which is which)and that's the only thing that looks similar to your equation
The speed of light can be given as c=1/sqrt(e*u) where e and u are the permitivity and permeability of a vacuum(I forget which is which)and that's the only thing that looks similar to your equation
- #4
Shooting Star
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samsam said:
We are more than at a loss, we are zonked or something to that effect.
samsam said:
Who is Samssin?
Please answer asap.blochwave said:
(Let the speed of darkness be 'd'.)
Suppose a region was lit by a light source. Then you switch off the light. The envelope of darkness then would proceed at the speed of light, from the has-been light source. We may call this the speed of darkness, for which slightly contradicting but well meaning formulas had been given by you two.
Hence, c=d.
- #5
samsam
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Hi me again, totally lost can anyone help ?
what's that experiment when they slowed down light?
what's that experiment when they slowed down light?
- #6
belliott4488
- 661
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samsam, can you tell us where all this is coming from? Who is asking you about the "speed of dark"?
As for light being slowed down, light will always travel through any medium at a speed somewhat less than its speed in vacuum. That's not a specific experiment, it's just an outcome of the way light propagates through media.
Perhaps you're referring to the recent experiments where light was effectively brought to a stand-still and stored for a short while before being released again? That's due to something called Quantum Entanglement, and cannot be explained by simple expressions from Classical Electrodynamics, such as what you seemed to be offering in your original post (although I'm still not sure what that was ...)
As for light being slowed down, light will always travel through any medium at a speed somewhat less than its speed in vacuum. That's not a specific experiment, it's just an outcome of the way light propagates through media.
Perhaps you're referring to the recent experiments where light was effectively brought to a stand-still and stored for a short while before being released again? That's due to something called Quantum Entanglement, and cannot be explained by simple expressions from Classical Electrodynamics, such as what you seemed to be offering in your original post (although I'm still not sure what that was ...
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