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LC Physics
LC Physics
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From looking at the past papers about 90% of the marks for Biology can be gained from knowledge of all the definitions and theory. Most questions are not direct definitions but theory questions like "describe the..." and "draw the...". Direct definitions are about 20% of the paper. As the paper is mostly theory based, calculations are quite rare unlike chemistry and physics.

For chemistry on the other hand the marks are more mixed up. I would say about 55 - 60% can be gained from definitions and theory while the rest come from calculations. The first few lab experiment and... (More)

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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.

Magnetism notes