MCQ
Which of the following statements is true$/$correct
- ADuring clear nights, the temperature rises steadily upward near the ground level
- ✓Newton's law of cooling, an approximate form of Stefan's law, is valid only for natural convection
- CThe total energy emitted by a black body per unit time per unit area is proportional to the square of its temperature in the Kelvin scale
- DTwo spheres of the same material have radii $1 \mathrm{~m}$ and $4 \mathrm{~m}$ and temperatures $4000 K$ and $2000 K$ respectively. The energy radiated per second by the first sphere is greater than that radiated per second by the second sphere
