What is the difference between magnitude and intensity in physics?

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Discussion Overview

The discussion centers on the difference between magnitude and intensity in physics, with participants seeking clarification on these concepts and their applications. The scope includes conceptual understanding and potential examples.

Discussion Character

  • Conceptual clarification, Debate/contested

Main Points Raised

  • One participant, samar, asks for the difference between magnitude and intensity without specifying a context.
  • Another participant questions what specific aspect of magnitude and intensity is being referred to, suggesting that the terms need context to be properly understood.
  • A later reply emphasizes that intensity has a specific meaning in physics, defined as the time-averaged energy flux, and distinguishes it from colloquial uses of the term.
  • This reply also mentions the calculation of intensity involving energy density and velocity, but does not clarify how this relates to the concept of magnitude.
  • There is a suggestion that the terms may not be directly comparable without additional context.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the definitions of magnitude and intensity, and there are competing views regarding their meanings and applications.

Contextual Notes

The discussion lacks specific definitions or examples of magnitude, and the relationship between magnitude and intensity remains unclear. There is also an absence of agreement on the contexts in which these terms should be applied.

samar
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May i know the difference...

Hello,how are you all?

i want to know the main differnce between magnitude and intensity with example?

regards

samar
 
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samar said:
Hello,how are you all?

i want to know the main differnce between magnitude and intensity with example

Hello samar! :smile:

I'm very well, thankyou. How are you?

erm … the difference between magnitude and intensity of what? :smile:
 
magnitude and intensity not of anything...just magnitude n intensity...like of atom?
 
… wikipedia again … !

Hi samar! :smile:

Intensity isn't normally used in physics, and when it is, it has a very particular meaning … see http://en.wikipedia.org/wiki/Intensity:
In physics, intensity is a measure of the time-averaged energy flux. The word "intensity" here is not synonymous with "strength", "amplitude", or "level", as it sometimes is in colloquial speech. For example, "the intensity of pressure" is meaningless, since the parameters of those variables do not match.
To find the intensity, take the energy density (that is, the energy per unit volume) and multiply it by the velocity at which the energy is moving. The resulting vector has the units of power divided by area (i.e. watt/m²).

Have you come across it in some book? :smile:
 

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