A high-speed image features this week. Here we have 3 separate images of a double waterdrop collision taking place underneath a bursting soap-bubble. I have used different coloured filters in front of the high-speed flash units. The HSF units are of my own design and give out 50 Joules of light in 10-microseconds (1/100,000th of a second). They are highly portable and run off a 12 Volt battery.
