Physics book 3 topic 1 - Radiation 0.0 / 5 ? PhysicsMedical PhysicsLight and OpticsGCSEEdexcel Created by: KhalifaCreated on: 08-03-14 16:20 The energy from a 100W light bulb spreads over a surface of 4m squared. Calculate the intensity of radiation 25 W/m squared 1 of 8 A Diverging lens will always produce a... virtual Image 2 of 8 The object is placed between F and the Lens, the Image will be... Virtual, right way up, Magnified 3 of 8 The focal length of a lens is 0.5m. Whats the power of that lens? 1/0.5 = 2 D 4 of 8 Ben is short-sighted. He doesn't wear glasses because they are uncomfortable. What is a healthy alternative? Laser eye surgery, It can temporarily fix the eyes but can deteriorate in time. 5 of 8 If the angle of incidence (I) is equal to the critical angle... The emerging rays come out along the surface with some left to be internally reflected. 6 of 8 Endoscopes use... two bundles of optical fibres 7 of 8 The operation in which endoscopes are inserted are called... Keyhole surgery 8 of 8
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