P7 Quiz: Light, telescopes and images 5.0 / 5 based on 1 ratingTeacher recommended ? PhysicsEarth in spaceLight and OpticsGCSEOCR Created by: BomaCreated on: 23-06-13 22:02 What is refraction? The speed of a wave being affected by the medium it passes through 1 of 6 Power of a lens is worked out by... ...1/focal length of lens (metres) 2 of 6 Power of a lens is measured in... ...dioptres 3 of 6 What is a converging (convex) lens? A lens that causes parallel rays to converge to the focal point 4 of 6 Diffraction is... ...when waves move through a narrow gap or past an obstacle, they spread out from the edges 5 of 6 Magnification is worked out by... ...focal length of objective lens/focal length of eyepiece lens 6 of 6
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