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Oct 14, 2023 at 14:28 comment added Igor Thank you very much! Actually the phrase "but the field strength amplitude has a direction which is orthogonal to the direction of propagation" made things clear
Oct 14, 2023 at 14:25 vote accept Igor
Oct 14, 2023 at 12:07 history edited Frederic Thomas CC BY-SA 4.0
added 133 characters in body
Oct 14, 2023 at 11:32 history answered Frederic Thomas CC BY-SA 4.0