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Cookie
Duration
Description
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11 months
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11 months
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11 months
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11 months
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11 months
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11 months
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Είναι ενέργεια που μεταδίδεται με την μορφή κυμάτων.Υπάρχουν γύρω μας πολλές φυσικές και τεχνητές πηγές ηλεκτρομαγνητικής ενέργειας (ή ηλεκτρομαγνητικής ακτινοβολίας). Τα ηλεκτρομαγνητικά κύματα αποτελούνται από ηλεκτρικά και μαγνητικά πεδία και ταξιδεύουν στο κενό με την ταχύτητα του φωτός – περίπου 300,000,000 μέτρα ανά δευτερόλεπτο.