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LC Physics
LC Physics
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All Physics Definitions for Leaving Certificate - Higher Level

Light

  • 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)
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Heat – Leaving Cert Physics Terms

Temperature – of an object is a measure of the hotness or coldness of that object.

Thermometric Property – is any physical property that changes measurably with temperature.

Specific Heat Capacity – of a substance is the heat energy needed to change one kilogram of the substance by one Kelvin.

Specific Latent of Fusion (l) – is the amount of heat energy need to change 1 kg of the substance from a solid to a liquid without a change in temperature.

Specific Latent of Vaporisation (l) – is the amount of heat energy needed to change 1 kg of the... (More)

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Semiconductors & Electromagnetic Induction – Leaving Cert Physics Terms

Semiconductor – is a material whose resistivity is between that of a good conductor and a good insulator.

Intrinsic Conduction – is the movement of charges through a pure semiconductor.

Extrinsic Conduction – is the movement of charges through a doped semiconductor.

Doping – is the addition of a small amount of atoms of another element to a pure semiconductor to increase its conductivity.

n-type semiconductor – is a semiconductor in which electrons are the majority charge carriers.

p-type semiconductor – is a semiconductor in which holes are the majority charge carriers.

Ampere – is that current which, if flowing... (More)

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)