Physics Unit 2 0.0 / 5 ? PhysicsMaterialsASAQA Created by: jatyizationCreated on: 23-03-14 23:02 What is the density of a material? Substances mass per unit volume 1 of 12 What is elasticity? Solid that can regain shape after being deformed or distorted 2 of 12 What is meant by tensile? deformation that stretches 3 of 12 What is meant by Compressive? Deformation that compresses 4 of 12 Why do diamonds sparkle? Split white light into colour spectrum; high refractive index; light ray reflected many times before emerging 5 of 12 Why is the core narrow in optical fibres? Narrow to prevent multipath dispersion 6 of 12 What is the cladding used for? To prevent damage to the optical fibre and because TIR takes place at cladding boundary 7 of 12 Why does refraction occur? different speed of light in each substance 8 of 12 What is Newtons fist law? Objects either stay at rest or remain in uniform motion unless acted upon by a force 9 of 12 What is Newtons 2nd law? resultant force = mass x acceleration 10 of 12 What is power? rate of energy transfer 11 of 12 What is efficiency? amount of useful energy produced 12 of 12
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