Air does not intervene with radiation

[mech-eng]

I cannot understand the expression "air does not intervene with radiation". Would you please explain what it means in detail?

" Considering that air does not intervene with radiation and the person is completely enclosed by the surrounding surfaces, the net rate of radiation heat transfer from the person to the surrounding walls, ceiling, and the floor is, from Eq"

Thermodynamics An Engineering Approach

http://www.people.vcu.edu/~vnicule/Part II First Law.htm

 

[willem2]

That means that they are ignoring any termal radiation absorbed or emitted by the air in the room. If you are indoors and not in a very large room the error from this shouldn't be too large.

 

[mech-eng]

That means that they are ignoring any termal radiation absorbed or emitted by the air in the room. If you are indoors and not in a very large room the error from this shouldn't be too large.

I have looked some meanings of intervene. But I cannot find a definition for it for this case

http://www.macmillandictionary.com/dictionary/american/intervene

What could be a definition for intervene with used as in the example?

Thank you.

 

[jim mcnamara]

Intervene means 'get in the way of or intercept':

rewritten: Considering that air does not interfere with radiation and does not affect radiation coming from the human in reaching the walls, and the person is completely enclosed by the surrounding surfaces, the net rate of radiation heat transfer from the person to the surrounding walls, ceiling, and the floor is, from Eq

 

[mech-eng]

Intervene means 'get in the way of or intercept':

rewritten: Considering that air does not interfere with radiation and does not affect radiation coming from the human in reaching the walls, and the person is completely enclosed by the surrounding surfaces, the net rate of radiation heat transfer from the person to the surrounding walls, ceiling, and the floor is, from Eq

I am confused. Did you mean intervene instead of interfere? We are discussing intervene.

Thank you.

 

[Mark44]

rewritten: Considering that air does not interfere with radiation

I am confused. Did you mean intervene instead of interfere? We are discussing intervene.

I am certain that he meant what he wrote. The rewritten version uses a different word that is close to being a synonym of intervene. When you redefine something, you use different words. If you define a word using the same word, that's a circular definition.