A hollow aluminium cube contains very hot water. Face $X$ of the cube is opposite face $Y$ of the cube. Of these two faces, one is black and the other is white. A student places the back of one hand $5\,\text{cm}$ from face $X$, and then straight away places the back of the other hand $5\,\text{cm}$ from face $Y$. The hand near face $Y$ feels hotter than the hand near face $X$. Which row names the black face and correctly compares the rate at which thermal radiation is emitted from each face?
- Ablack side: $X$; rate of emission: greater for $X$
- Bblack side: $X$; rate of emission: the same for $X$ and $Y$
- Cblack side: $Y$; rate of emission: greater for $Y$
- Dblack side: $Y$; rate of emission: the same for $X$ and $Y$