A solid copper cube and sphere both of same mass and emissivity at
Answers
Answer:
a solid copper cube and sphere, both of same mass & emissivity are heated to same initial temperature and kept under identical conditions.
The emissivity of copper sphere is more than the emissivity of copper cube if they are kept at same temperature with same surface condition.
Explanation:
The emissivity of copper sphere is more than the emissivity of copper cube if they are kept at same tempurate with same surface condition and the wavelength which is emitting on them is of same wavelength. There are many more factors. But these factors are most important.
As, it is given that they they are of sam mass and of same material copper. It means there densities are also same.
Then, there volume is also same.
As, we know that suface area of sphere is more than the surface area of cube. when they are of same volume. The surface are of sphere is 8.163 times more than the surface area of cube.
Surface area of material is an important factor for consideration of emissivity.
Emissivity is defined as the ratio of radiation radiated from a body to the radiation emitted from a black body.