\begin{tabular}{|l|l|}
Q.30 & $\begin{array}{l}\text { Given that } E \text { (in } \mathrm{W} \cdot \mathrm{m}^{-2} \text { ) is the total hemispherical emissive power of a surface } \\
\text { maintained at a certain temperature, which of the following statements is/are } \\
\text { CORRECT? }\end{array}$ \\
\hline
- & $E$ does not depend on the direction of the emission. \\
\hline - & $E$ depends on the viewfactor. \\
\hline - & $E$ depends on the wavelength of the emission. \\
\hline - & $E$ does not depend on the frequency of the emission. \\
\hline &
\end{tabular}