Overall the brick probably does not cool faster, might even be the opposite. Namely, the brick losses its red glow because the outside cools down faster, but its inside remains hot. The iron ball remains red hot for longer because iron conducts heat better. So the heat inside the ball is conducted to the outside of the ball. This does mean that the core of the iron ball probably losses heat faster than the core of the brick, such that the average temperature of the brick would be higher over time then that of the iron ball.

@@kwinvdv -/are you sure? The brick is very irregular which opens more surface area for the brick to cool?

In order to answer to your question ,I might have to read newton's law of cooling

@@motif123456 Yes, they're sure... That's the whole point of this demonstration ya'll.

But that is not this video means here... LOL

Blue is given at the highest temperature after white.

Isn't it seen when kept in a dark room?

@@mhaziq1687 yes it is seen as it is radiatingbtue heat and thus producing the light. If it reflects the light then it won't be seen in dark..

NCERT padh k aae hona 11th ki

@@apoorvdeshmukh5420 😅 haa

You prolly dont care but if you're bored like me during the covid times then you can stream pretty much all of the latest movies on instaflixxer. Have been binge watching with my brother for the last couple of days :)

@Cason Ryder Yea, I've been watching on instaflixxer for years myself :)

😂

😂😂

Lol

But mujhe esi videos jyada pasand h

@@kushagrasharma6679 hmmm 🙃

Heat loss at this temperature is dominated by radiation, so it's due to difference in emissivity. The brick has far higher emissivity than the iron and so loses heat energy faster, and thus falls below the Draper point first.

Yes we can see towards the end of the video that the glow of the exterior of the brick doesn't last as long as it does for the iron. It's also interesting to note that the brightness and color of the interior of the brick (which nearly keeps pace with the exterior of the iron) is much different than it is for the outside surface, which is consistent with brick having low thermal conductivity.

The irregular brick's surface is quite large compared to that of the iron ball. Indeed, the iron's surface area is minimized by the fact that it's a sphere.

@@NatSciDemos I consider myself to be a layman, I have no qualifications for anything to speak of and when I say that I look at things with fresh eyes, I basically try to see based on what I have seen throughout my life and always try to see if there's anything else other than what we are taught. To me! I saw an iron ball and a brick chunk placed into a high energy field, both items have different properties in a few key areas, one is that the iron ball has less surface area than that of the brick chunk and this is quite obvious as we are taught that surface area makes a difference! But that's just the surface! We have to also consider the individual properties of both items! The iron ball is possibly made up of iron, oxygen and carbon. It's definitely a more pure substance than the brick chunk which I believe is made up of a lot more molecules and therefore less pure, but please don't quote me on that as I could be wrong... The surface of both is the interface to the atmosphere but I'm thinking about the makeup of the two objects and how the internal makeup of molecules are working to allow the energy release to the surface! The iron ball only has the iron, oxygen and carbon and if I was to look at this as an electronic circuit, there are only three different components available to develop a circuit! The brick chunk on the other hand appears to have a lot more components to work with and therefore could possibly be a much more complicated circuit than the iron ball, I still don't see how looking at it from this perspective view could be helpful but I have a feeling that there's something in it that could possibly open the door to a new way of looking at the problem! I always question if we really understand what which we believe we understand! I never had this level of interest in anything way back when I was at school, I seem to have a much better ability to focus on everything in my older years and KZfaq is an amazing platform that allows far more people to connect than was otherwise possible. I believe that there's lots of similarity between the different types of energy, having an understanding of thermal energy would also help you if you developed an interest in electronics, it's all about controlling the flow of energy in a circuit to obtain a useful outcome, the properties in the iron ball and brick chunk play an important role in how the energy is accepted to reach equalebreum with the oven and then the reverse to reach equalebreum with the atmosphere around them, it's just a matter of finding the connection... I hope that I made some sort of sense...

@Robert Hunt heat is the evaporation of electric charge, which is why you can use a peltier device to reclaim heat into electric current.

It is true that that the interior of the furnace may not be a perfect blackbody cavity, since some light is able to make it through the open door and illuminate it a little bit. When the iron ball and brick chunk are first inserted into the furnace, we can distinguish them from the walls, because the ball and chunk are at (close to) room temperature, and looking into the furnace we can see some of the light that reflects off of their surfaces. However, once the objects reach the same temperature as the inside of the furnace, then the furnace approximates a blackbody cavity because the vast majority of the light coming out of it is due to the thermal radiation of the interior. So when we open the door, the objects appear at nearly the same brightness and color as the furnace interior, and are nearly indistinguishable.

@@NatSciDemos hey! I had a doubt about this I'm not able to understand our teacher told us that a black body would appear of the same colour throughout the surface like a furnace or an oven (complete orange-red) so was this told to indicate the fact that the black body would uniformly absorb all radiations throughout the surface and would have the same temperature throughout( unlike sunspots in the sun)? Can you also explain about cavity radiation?

minerva If you have a few months read Dr. PM Robitaille's writing on blackbody radiation. Not a single KZfaq video on the topic gets it correct. They just understand that Planck used the problem to get to the quantum of action. Robitaille will eventually be proven right and a whole lot will change.

A "blackbody" is basically an object that does not reflect any light from other sources, and so its brightness and color are purely due to its own thermal emission. The Sun is a good example of a blackbody, since pretty much all of the light that radiates from it is due to the heat of its surface.

@@NatSciDemos then y it is saying that black body is black in color

No bruhh because of black body radiation!!

It's due to material, and ability to absorb heat

No, it's because it's square (that's bartv's law).

No, it's because it's square (that's bartv's law).

Because of the material other than iron

I you have a furrnace and a bagel, I cant concieve of not trying that as one of the first things.

Content

It is wein's displacement law. That is same temperature means same wavelength of light...

no matter the material at same temperature they will have same color of radiation (assuming they aren't at their melting or boiling point)

Yes. But u can eat it only once

Probably tastes heavenly

@@anorange28 lol 😂😂

Objects of the same temperature emit the same wavelength of light.

Yes, the Wien's displacement law...

@@NatSciDemos The theory of blackbody radiation deals with a continuous spectrum. On the other hand hydrogen will always produce the same wave lengths of emission more or less independent of temperature. This is not about blackbody radiation no matter what you call your oven.

Come on, this is not an appropriate number of significant figures Chemist Cat!

I think i saw you somewhere. Ahh is it the video where a korean kid meets an american kid?