Lesson
Lesson-9.1.4- explain some of the uses of electromagnetic radiations, including: ??? visible light: optical fibres and photography ??? ultraviolet: fluorescent lamps.
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Lesson-9.1.3- explain some of the uses of electromagnetic radiations, including: ??? radio waves: broadcasting and communications ??? microwaves: cooking and satellite transmissions ??? infrared: heaters and night vision equipment.PreviousLesson-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.Next