This A Level Physics textbook covers all the requirements of the AS & A2 Physics specifications. This fifth edition has been updated to include: revisions to the content to reflect changing AS & A Level specifications; a new chapter on cosmology & astrophysics; revisions to text & photographs to ensure that examples are up-to-date; updated examination questions from recent past papers; samples of the use of spreadsheets & dataloggers; & the use of full colour throughout.