Question Bank MCQ • 1 Mark Section 3: Electromagnetic Theory Poynting vector

QB_PH_088: Poynting vector

Question Statement

The solar constant ($1360\text{ W/m}^2$) represents:
(A) The time-averaged solar Poynting vector magnitude at Earth orbit outside atmosphere
(B) Total solar luminosity
(C) Solar radiation pressure
(D) Peak solar frequency
Correct Answer
A
Verified Key

Step-by-Step KaTeX Derivation & Detailed Explanation

### Solution: Energy flux density per unit area (magnitude of $\langle \mathbf{S} \rangle$).
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