There's a rather good book called Einstein's Mirror, which is a solid introduction to Special (and a little bit of General) Relativity aimed mainly at an undergrad/2nd year A-level audience.
http://www.amazon.co.uk/Einsteins-Mirror-Tony-Hey/dp/0521435323
I highly recommend it for anyone who'd like to study more about SR without ploughing through an entire physics degree or a TV special with Dara O'Brien and Brian Cox.
http://www.amazon.co.uk/Einsteins-Mirror-Tony-Hey/dp/0521435323
I highly recommend it for anyone who'd like to study more about SR without ploughing through an entire physics degree or a TV special with Dara O'Brien and Brian Cox.