Physics: Ch 24C - Heat Radiation: Test Your Knowledge (3 of 20) Intensity of a Radiating Sphere

We will find the intensity of the net radiated energy=? Given a tungsten (W) sphere at 3000K with a radius of 1cm suspended by a non-conducting string in a room kept at 300K.

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[rafakordaczek]

Very simple and nice example. I firstly wondered why do we assume area to be the same for the surrounding room. But then I imagined, that the sphere, in some regard, requires adding less power, if some of it is provided by the surrounding.

[sokphann]

u should get more views, i think !! thank a lot !!!

[oneinabillion]

Hi sir, intensity should be radiant emittance right? Don't we have to divide final answer by Area?
It's minor thing, but great video!!