Electromagnetic waves (Question 1 (8 Marks)) — UPSC Physics Optional IFoS 2025 Paper I
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For a plane electromagnetic wave given by : \text{E}_{\text{z}} = \text{a}\cos \omega\text{x} \cos \omega\text{ct} \text{H}_{\text{y}} = -\text{a}\sin \omega\text{x} \sin \omega\text{ct} Find the value of the Poynting vector.
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