Crowell and colleagues took photos of the snakes using a camera with a specialized lens and light filters to see what kind of ultraviolet color they were reflecting. They did not investigate ...

The colour of an object is determined by the ... We see higher frequencies of light as blue or violet, lower frequencies of light are seen as red and orange. Green light is in the middle.

Apple slices were treated with violet LED light at 700 lx at 10°C for 4 days, and samples were collected every 2 days. The samples were stored in the dark at 10°C as a control.