Spectrum observed on heated vessel

[Cromptu]

Today i was heating a bowl of soup..the intensity of the flame of the gas stove was quite high..
i observed that the bowl got burnt and when it cooled down a bit, i observed a band of colours..blue was the most prominent..i noticed the presence of violet, yellow and orange too..
I wish to know the reason behind this..and the scientific view of what happened..
Thankyou :)

P.S - I don't know anything about the material of the bowl..And i have attached a picture of it too..

 

[Khashishi]

This is a thin film effect, called iridescence. The material is some thin layer of corrosion, maybe chromium oxide. It doesn't really matter what the material is, as long as the material is thin and refractive. Light which penetrates the material and reflects off the metal will interfere with light which reflects off the material, either constructively or destructively, depending on the thickness of the film and the color of the light.

 

[Cromptu]

thankyou :)
also, why didn't this happen when i heated a similar bowl on a low intensity flame?
is it related to the oxidation?

 

[Khashishi]

Yeah. The reaction rate increases approximately exponentially with increasing temperature.

 

[sardar]

Thank you for sharing your observation with us. The band of colors that you observed on the heated bowl is known as a spectrum. This is a result of light being separated into different wavelengths due to the refraction and reflection of light on the surface of the bowl. The different colors that you saw, such as blue, violet, yellow, and orange, each have a different wavelength and are therefore refracted at different angles, resulting in the band of colors that you observed.

The reason for this phenomenon is due to the composition of the bowl's material. Without knowing the specific material of the bowl, it is difficult to determine the exact reason for the colors observed. However, different materials have different abilities to absorb and reflect light, which can result in the spectrum that you saw.

In terms of the scientific view, this is known as the phenomenon of light dispersion. When light passes through a material, such as the heated bowl, it can be bent or refracted due to the material's properties. This results in the separation of light into its different wavelengths, creating the spectrum that you saw.

I hope this helps to answer your question. If you are interested in learning more about light dispersion and the properties of different materials, I would recommend further research or consulting with a materials scientist. Thank you again for sharing your observation with us.