A virtual image
An apparent intersection of light rays
Heat
A form of energy that causes a rise in temperature when added or a fall in temperature when withdrawn
Electromagnetic wave
Do not require a medium to travel through and cause an electric and magnetic disruption
Force
Anything which causes the velocity of an object to change/ accelerate
Quark
A fundamental particle that experiences all four fundamental forces and constitutes matter
Refraction
Refraction is the bending of light at a boundary as it passes from one transparent medium to another
Temperature
the measure of the hotness of coldness of any object
Longitudinal Wave
Direction of vibration is parallel to the direction in which the wave travels.
Potential Energy
energy due to position or conformation
Pair Production
The simultaneous creation of a particle and its antiparticle from electromagnetic energy
The laws of Reflection
The angle of incidence (i) is equal to the angle of reflection (r)
Incident ray, reflected ray and normal are all on same plane
Specific Heat Capacity
The heat energy needed to raise the temperature of 1 kg of a substance by 1 Kelvin
Diffraction
The spreading out of a wave as it moves through a gap or around an obstacle
A Couple
A pair of equal parallel forces that turn in opposite directions
Meson with an example
Hadrons formed from a quark and an anti-quark
-pion - ud, kaon - us
Critical Angle
the angle of incidence in the denser medium that produces an angle of refraction of 90 degrees in the rarer medium
The specific latent heat of vaporisation
the amount of heat energy needed to change 1 kg of the substance from a liquid to a gas without a change in temperature
Quality of a note
The relative strength and number of overtones present
Newtons Universal Law of Gravitation
Every mass in the universe attracts every other mass with a force, along the lines of their centres, that is proportional to the product of their two masses and inversly proportional to the square of the distance between them
Fundamental Forces by Ascending Strength
Gravity, Weak Nuclear, Electromagnetic, Strong Nuclear
The Refractive Index
The ratio of the sine of the angle of incidence to the sine of the angle of refraction when light travels from a vacuum into that medium
The U-value of a structure
The amount of heat energy conducted per second through 1 m squared of that structure when a temperature difference of 1 K is maintained between its ends
Standing/Stationary Wave
A wave where the amplitude at any point is constant. It is formed when waves of the same frequency and amplitude, but travelling in opposite directions, meet.
Archimedes' Principle
Whenever an object is totally or partially immersed in a fluid, it experiences an upthrust that is equal to the weight of the fluid it displaces
Fermion
All particles with mass