# The Big Bang

Mind Map by , created over 5 years ago

## Part of P1

91
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2
 Created by I Turner over 5 years ago
P1.2 Energy And Efficiency
P1.3 The Usefulness Of Electronic Appliances
WAVES
AS Psychology - Research Methods
GCSE Science - B1 - You and Your Genes - Genes, Chromosomes and DNA
P1.1 The Transfer Of Energy By Heating Processes
P1.5 The Use Of Waves For Communication
P1.4 Methods We Use To Generate Electricity
Core science - Physics
The Big Bang
1 Basics of Waves
1.1 Amplitude
1.1.1 Displacement from rest position to crest
1.2 Wavelength
1.2.1 The length of a full cycle of the wave
1.2.2 Crest to Crest
1.3 Transverse Waves
1.3.1 Vibrations are perpendicular (at 90°) to the direction of energy transfer of the wave
1.3.2 Light, Waves on Strings, Ripples
1.4 Longitudinal Waves
1.4.1 The vibrations are parallel to the direction of energy transfer of the wave
1.4.2 Sound waves, ultrasound, shock waves
1.4.3 Sound waves, Ultrasound, Shock waves
1.4.4 Sound Waves, Ultrasound, Shock Waves
1.5 Wave Speed = Frequency x Wavelength
2 Waves Properties
2.1 Reflection
2.1.1 What allows us to see objects
2.1.1.1 Light bounces off them into our eyes
2.1.2 Light travelling in the same direction from an...
2.1.2.1 ...even surface
2.1.2.1.1 Light is reflected at the same angle
2.1.2.1.1.1 Clear reflection
2.1.2.2 ...uneven surface
2.1.2.2.1 Light Reflects off at different angles
2.1.3 Angle of INCIDENCE=Angle of REFLECTION
2.1.4 RAY DIAGRAM
2.1.4.1
3 Diffraction
3.1 Waves spreading out when at the edges when they pass through a gap or pass an obstacle
3.2 The longer the wavelength, the more the wave spreads out
3.3
4 Refraction
4.1 When a waves crosses a boundary between two substances it changes direction
4.1.1
4.2 Waves are only refracted if they meet a new medium at an angle
4.3 If they're travelling along the normal they will change speed, but are NOT refracted
5 The EM Spectrum
5.1 Uses and Dangers of EM Waves
5.1.1 Microwaves
5.1.1.1 Uses=Satellites
5.1.1.2 Dangers=Burns, Cancer
5.1.2.2 Dangers=None
5.1.3 Infra Red
5.1.3.1 Uses=Cooking, Night Vision
5.1.3.2 Dangers=Burns
5.1.4 Visible
5.1.4.1 Uses=Seeing
5.1.4.2 Dangers=Eye Damage
5.1.5 Ultra Violet
5.1.5.1 Uses=Discos, Tanning
5.1.5.2 Dangers=Skin Cancer
5.1.6 X-Ray
5.1.6.1 Uses=Medical Imagery, Security
5.1.6.2 Dangers=Cancer
5.1.7 Gamma
5.1.7.1 Uses=Observing the Universe
5.1.7.2 Dangers=Cancer
5.2 The Basics
5.2.1 EM Waves with different wavelengths have different properties
5.2.1.1
5.2.1.1.1 All types of EM Waves travel at the same speed in a vaccum
5.2.1.1.2 EM Waves have higher frequencies and shorter wavelengths
5.2.1.1.3 Randy Men In Violet Underwear eXite Girls
6 Sound Waves
6.1 We hear sounds as vibrations
6.1.1 They're passed through the surrounding medium as a series of compressions
6.1.1.1
6.2 Sound travels faster in solids than liquids, and faster in liquids than gases
6.3 Sound can't travel in space because it's mostly a vaccum
6.4 Reflection and Refraction
6.4.1 Sound Waves can be reflected by hard flat surfaces
6.4.2 Echoes are Reflected Sound Waves
6.4.3 Sound waves will refract as they enter different media
6.4.3.1 As they enter denser material, they speed up
6.4.3.2
6.5 The higher the frequency, the higher the pitch
7 The Origin of the Universe
7.1 Expanding
7.1.1 Galaxies moving away from eachother
7.2 The Doppler Effect
7.2.1
7.3 Red-shift
7.3.1 The more distant the galaxy, the more red it appears
7.4 Big Bang Theory
7.4.1 All matter and energy in Universe was compressed into a small space
7.4.1.1 It exploded from that point and started to expand
7.4.2 14 billion yrs ago