The ocean is blue because water absorbs colors in the red part of the light spectrum. Like a filter, this leaves behind colors in the blue part of the light spectrum for us to see. When sunlight hits ...

Ultraviolet has very short and energetic wavelengths that are shorter than violet on the visible spectrum. But can people see UV? When you purchase through links on our site, we may earn an affiliate ...

Michael Freeman is a founder of The Skin Centre, a private dermatology practice on the Gold Coast, Queensland. The centre has developed its own range of skincare products. Blue light is part of the ...