Lesson
Lesson-9.1.7- explain the detrimental effects of excessive exposure of the human body to electromagnetic waves, including: ??? ultraviolet: damage to surface cells and blindness ??? gamma rays: cancer, mutation and describe simple protective measures against the risks.
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Lesson-9.1.6- explain the detrimental effects of excessive exposure of the human body to electromagnetic waves, including: ??? microwaves: internal heating of body tissue ??? infrared: skin burns.PreviousLesson-10.1.1-know that light waves are transverse waves and that they can be reflected and refracted.Next