Physics · UNITS AND MEASUREMENT

The dimensional formula of Stefan-Boltzmann constant \( \sigma \) in the equation \( E = \sigma T^4 A t \) (where \( E \) is energy, \( T \) is absolute temperature, \( A \) is area, and \( t \) is time) is:

1. A
   \( [\text{M L}^0 \text{T}^{-3} \text{K}^{-4}] \)
2. B
   \( [\text{M L}^2 \text{T}^{-3} \text{K}^{-4}] \)
3. C
   \( [\text{M L} \text{T}^{-2} \text{K}^{-4}] \)
4. D
   \( [\text{M L}^0 \text{T}^{-2} \text{K}^{-2}] \)