Unit 1: Energy
Unit 2: Electricity
Unit 3: Particle Model of Matter
Unit 4: Atomic Structure
Unit 5: Forces
Unit 6: Waves
Unit 7: Electromagnetism
Unit 8: Space
Oops! This image does not follow our content guidelines. To continue publishing, please remove it or upload a different image.
Oops! This image does not follow our content guidelines. To continue publishing, please remove it or upload a different image.
Wavelength: the distance between one peak or trough and another. Frequency: the number of waves per second. Wave Speed: the speed at which a wave travels. Amplitude: the maximum disturbance from its undisturbed position. Transverse: particles vibrate at a right angle to the direction. Longitudinal: particles vibrate parallel to the direction. Compressions: when the waves are compressed. Found in longitudinal waves. Rare Factions: when the waves are not compressed. Found in longitudinal waves. Reflection: when a surface does not absorb any energy, but bounces it back. Used in mirrors. Refraction: the change in direction of a wave when it hits the boundary between two mediums. Used in lenses Dark: absorbs. Light: reflect/transmits. Hard: reflects. Soft: absorbs. Smooth: specular. Rough: diffuse. Shiny: reflects. Dull: absorbs. Transparent: transmits. Each colour has a different wavelength of light. When light hits an object, the object will absorb these different wavelengths or reflect them. For example, red objects will absorb all the colours except red, which it will reflect. If the object is black, all colours will be absorbed, but if the object is white, all the wavelengths will be reflected. If an object is grey, then all the wavelengths are partially absorbed and partially reflected.
Law of Reflection: Angle of reflection=Angle of incudies. Radio waves, used in communication, cause cancer. Microwaves, used in cooking, internal heating of body tissue. Infrared, used in night vision cameras, can burn. Visible, seeing things, magnetic radiation. Ultraviolet, tanning beds, skin cancer. X-rays, see bone break/fractures, lightheadedness. Gamma rays, kills cancer cells, kills non-cancerous cells. Required Practicals: Wave speed: Ripple tank - water in tank - raise one edge - drop - time how long it takes for the wave to return. Leslie Cube: Hot water in leslie cube - measure temp of each surface every 10 seconds.
