AQA Physics module 3 Here are some revision flashcards for AQA module 3a, Enjoy! Good luck in your test Matt 3.0 / 5 based on 1 rating ? PhysicsGCSEAQA Created by: MattCreated on: 21-05-13 12:35 Name 2 ways that X-rays are used in Medicine CT scans, Cancer Treatment 1 of 14 How do radiographers minimise their radiaton dose? Wear lead aprons, stand behind a lead screen, or leave the room while scans are being done 2 of 14 What is ultrasound? Sound with a higher frequency than we can hear 3 of 14 what is the range of human hearing? 20-20,000 Hz 4 of 14 Name two uses of ultrasound Breaking down kidney stones, and pre-natal scanning of a fetus 5 of 14 What is refractive index? The ratio of the velocity of light in a vacuum to its velocity in a specified medium 6 of 14 How do you work out refractive index? Refractive index= sin i divided by sin r 7 of 14 Give the two types of lenses Converging and diverging 8 of 14 What type of lenses do magnifying instruments use? Converging lenses 9 of 14 What is the magnification formula? Magnification= Image height divided by Object height 10 of 14 Name 5 parts of the eye Any 5 of the following: Iris, Cornea, Pupil, Lens, Ciliary Muscle, Retina, Suspensory Ligaments 11 of 14 What lenses correct long-sighted vision? Converging lenses 12 of 14 What lenses correct short-sighted vision? Diverging lenses 13 of 14 How does laser eye surgery work? A laser is used to vaporise some of the cornea to change its shape, which changes its focusing ability 14 of 14
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