Skip to main content

LC Physics
LC Physics
3 questions
26 posts

Do you have questions about LC Physics?

Log in to ask questions about LC Physics publicly or anonymously.

Force and Types of Forces

Parts and functions of the eye

Share Notes
LC Physics

All Physics Definitions for Leaving Certificate - Higher Level


  • Refraction is the bending of light as it goes from one medium to another.
  • Laws of Refraction: (1) Incident ray, refracted ray & normal are on the same plane. (2) Sine I/Sine R is constant.
  • Refractive Index: Sine I/Sine R = 1/Sin C = Real depth/Apparent depth = c1/c2
  • Critical Angle: The angle whose angle of incidence is 90 when light goes from a denser to a rarer medium.
  • Total Internal Reflection: When light travelling from a denser to a rarer medium strikes the second medium with an angle of incidence greater than the critical angle, it is reflected... (More)

Newton’s First Law of Motion – every object will remain in a state of rest or travelling with a constant velocity unless an external force acts on it.

Newton’s Second Law of Motion – the rate of change of an object’s momentum is directly proportional to the force which caused it.

Newton’s Third Law of Motion –  if an object A exerts a force on an object B, then object B will exert an equal but opposite force on object A.