Lesson
Lesson-9.1.5- explain some of the uses of electromagnetic radiations, including: ??? x-rays: observing the internal structure of objects and materials, including for medical applications ??? gamma rays: sterilising food and medical equipment.
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Lesson-9.1.4- explain some of the uses of electromagnetic radiations, including: ??? visible light: optical fibres and photography ??? ultraviolet: fluorescent lamps.PreviousLesson-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.Next