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The incoming solar radiation at a place on the surface of the earth is 1.2 kw/m2. The amplitude of the electric field corresponding to this incident power is nearly equal to—
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- 80 m V/m
- 2.5 V/m
- 30 V/m
- 950 V/m
Correct Option: D
From the Poynting vector, we have
| Pav = | |E|2 | |
| 2η |
where, η = 377 Ω for free space
E = √Pav × 2 × n
= √1.2 × 103 × 377 × 2
= 951.2 V/m
