Colour
Why a White Surface Can Look Blue in the Shade
Why a white surface can look blue in the shade: see how cooler skylight changes its appearance and how to separate…
The full collection
Reading list
Explore explanations and observations about light, from the colours around us to the reflections and shadows that give familiar scenes their shape.
Reflection
Plane and Curved Mirrors: How Their Reflections Differ
Plane and curved mirrors shape reflected light differently. Learn how surface shape affects image size, orientation…
Lenses
How Lenses Focus Light in a Camera Obscura
See how lenses focus light in a camera obscura, brighten its projected scene and differ from a pinhole, with a safe…
Shadows
Why a Shadow Edge Turns Soft
Understand shadow-edge softness by reading the source and object positions, then choose a simple setup that makes the…
Sky Light
How Cloud Cover Changes the Colours You See Through a Window
Cloud cover changes the colours you see through a window. Learn to separate shifts in colour, brightness and contrast…