Example to make clear the difference between specific intensity and fl

[alkmini]

hello
I amm trying to understand the difference between flux and specific intensity of radiation.
I understand that one is dependent on distance the other is not, but
can you make it more tangible with an example?

 

[Mordred]

not quite specific intensity is constant between emitter and receiver. No scattering, absorption etc

Flux is the net energy received an example is the redshift effects on a light wave.

http://www.ifa.hawaii.edu/users/kud/teaching_12/3_Radiative_transfer.pdf

The descriptions in the above article should make that clearer

 

[alkmini]

thank you