[1] Candle [1] Concave mirror [1] Lighter or box of matches [1] Sheet of metal ; Classroom Assembly. Place the equipment away from things that easily burn, like paper. Important Notes. Be careful not ...

Hold up a concave mirror facing the bulb and show that at a distance larger than the mirror's focal length, ... Ask the class what will happen if an index card covers part of the mirror, and then do ...