Original version

BBC World Service Online

CrowdScience

Documentaries

Factual: Science & Nature

Factual: Science & Nature: Science & Technology

Answering your questions about life, Earth and the universe

We take your questions about life, Earth and the universe to researchers hunting for answers at the frontiers of knowledge.

BBC World Service Australasia

BBC World Service schedule for American satellite radio and the Caribbean

BBC World Service Americas and the Caribbean

BBC World Service

BBC World Service South Asia

BBC World Service News Internet

BBC World Service Europe and the Middle East

BBC World Service East Asia

BBC World Service East and Southern Africa Schedule

BBC World Service East and Southern Africa

BBC World Service West and Central Africa Schedule

BBC World Service West and Central Africa

CrowdScience: What is white?

Discussion & Talk

GettyImages-1309817680_crop.jpg

19/08/2022 GMT

What is white?

BBC World Service - CrowdScience, What is white?

CrowdScience explores what makes an object appear white.

Have you ever wondered why waterfalls appear white when still water is transparent? Why clouds, or snow, appear white when they too are essentially just water molecules in different states? What makes something white, opaque or transparent? These are the questions CrowdScience listener Gerardo has been pondering ever since taking in the beauty of fallen water on a hiking trail in his home of Cantabria, Northern Spain. Presenter Marnie Chesterton, sets off on a quest to find out the answers to all of those questions and more. What even is white? Is it a colour, the absence of colour or all the colours of the rainbow combined? Is black really the opposite of white? And what colours do we mix to make white or black paint?

Image: White paint in pots and a paintbrush. Credit: Getty Images

Accessibility links

Programme Index

CrowdScience

What is white?

Genres

Formats

Brand

BBC World Service Online

About BBC World Service