Experiment with light

The descent of bubbles

Sunday 18th October 2015

My image for today was an experiment with a flash gun and children's bubbles. Against a black background and a dark room, I blew bubbles high above the background. I set my camera up for a two second exposure and as they descended, I fired the flash on high speed sync, giving me 10 flashes for the two second exposure. Interesting that only the top and bottom of each bubble is shown and two highlights in the middle. Is this the way the light is reflected around a sphere? Does each bubble descend at 9.8 metres per second, per second? Answers on a postcard. The result reminds me of the old 'Space Invaders' computer game.