I suppose most photographers (of any styles and competency) must have a interest in light. The way it bounces off some surfaces and is absorbed by others is fascinating - the way the merest change can radically alter the way that light interacts with that the surface makes for a constant shifting of colour and texture.
Back when I was a science teacher I used to love the practicals about light - especially bouncing light from pale surfaces to fill the darkness of shadows. For many students it was a "your not kidding" kind of moment when it became clear that the mad-man at the front had got it right when he said light bounced off things.
I suppose these two images from the harbor in Hobart sum up this idea - the way the light falling on the boat and coming straight back to the camera makes such a different image to the light coming to the camera via the surface of the water.
So, why is this Our World on Tuesday? I suppose it sums up an important aspect of our world, - that understanding how things really are does not take away a single iota of beauty or mystery.
You can find more images from around the world at Our World Tuesday.