Physics is the most basic of the sciences and is relevant in general medicine, radiography, medical imaging, physiotherapy, engineering, astronomy, ICT and all the natural sciences.  It deals with the laws and forces governing natural phenomena, which include heat, light, electricity and magnetism.

The Leaving Cert course was modified in 2000 and now allows more time for experiments and the exploration of ideas.  The backbone of the course comprises 28 mandatory experiments.  An advantage of the course is that once the syllabus has been covered there is not a huge amount of material to learn for the examination.