Four copper spheres have the same surface colour and the same surface texture. They differ in surface temperature and surface area. Which sphere emits infrared radiation at the highest rate?
- Asurface temperature $500^\circ\text{C}$, surface area $120\text{ cm}^2$
- Bsurface temperature $500^\circ\text{C}$, surface area $480\text{ cm}^2$
- Csurface temperature $1000^\circ\text{C}$, surface area $120\text{ cm}^2$
- Dsurface temperature $1000^\circ\text{C}$, surface area $480\text{ cm}^2$