00623nam a2200181Ia 4500 20260914083142.0 260914s9999 xx 000 0 und d 978 0 7496 9603 0 eng 535.3 RILEY, Peter Essential Science : LIght & Seeing Sidney Franklin Watts 2010 32 hlm. 26,5 cm Wher does light come from? Why can't we see in the dark? Why do we have shadows? This book answers all these questions and more through: factual information and practical investigation etc. 0 Grade 7-9 200406 200406 0 0 0 0 023 GEN 2011-02-01 0 535.3 RIL e-l 0231100008 2026-09-14 08:31:42 2026-09-14 BK