Physics p1 aqa 4.5 / 5 based on 2 ratings ? PhysicsP1GCSEAQA Created by: IT4335Created on: 21-05-17 09:32 How do we get infrared radiation and what objects emit it? From the sun and is emitted by all objects the hotter the object the more it emits 1 of 15 What are good absorbers of infrared radiation? dark and matt 2 of 15 What are good emitters of infrared radiation? dark and matt as they transfer energy and cool down quickly 3 of 15 What are good reflectors of infrared radiation? light and shiny surfaces 4 of 15 What is specific heat capacity? The amount of energy required to increase the temperature of a 1 kilogram of a substance by 1 degree 5 of 15 What is the U-value? How much energy travels through per second 6 of 15 Why are step up and step down transformers used? To reduce energy lost in transmission 7 of 15 What is a transverse wave? The oscillation of particles perpendicular to the direction of waves 8 of 15 What is a longitudinal waves? The oscilllation of particles parallel and is made of compressions and rarefractions 9 of 15 What type of waves are electromagnetic? Transverse 10 of 15 What type of waves are mechanical? Transverse or longitudinal 11 of 15 What is refraction of light? change in direction of a light beetween bounderies 12 of 15 What is the order of the elecromagnetic spectrum? gamma rays, x-rays, ultraviolet, visable, infrared, microwaves, radiowaves 13 of 15 How do optical fibres carry visable light and infrared radiation? Through total internal reflection 14 of 15 What is CMBR cosmic background radiation craeted by the big bang as it is the only way waves coud trvael in all diretions 15 of 15
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