Marmite turns white if you tap it

Louis Dor
Sunday 16 October 2016 14:15
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Picture:(BEN STANSALL/AFP/Getty Images/edited by indy100)

After all of the Marmite drama this week, we're sorry to bring you some more.

First, there was a Brexit-induced Marmite shortage which made Tescos a post-referendum battleground.

Then, a used jar of Marmite was selling on eBay for £100,000 in what could only be described as a dramatic over-reaction.

Now, we have a revelation. Brace yourselves:

Marmite changes colour, if you whip it.

An early YouTube video perhaps explains the phenomena best.

Watch the full video, below:

Witchcraft. Utter witchcraft.

Thankfully, science has an explanation.

If you whip Marmite, it becomes full of tiny bubbles - the more you whip in the more bubbles are crammed in.

Because Marmite is so sticky and viscous, the bubbles can hold their shape for a long time.

The reason the colour change occurs because as light travels into or out of an air bubble, it changes direction - the more bubbles the more light is scattered rather than be absorbed.

Therefore, the brown viscous Marmite will have had less opportunity to absorb the light, and what comes out is a a mix of Marmite and white light - therefore the Marmite is visibly lighter with air bubbles in.

In short, the more air is whipped in, the whiter it looks - much like egg whites.

What a wonderful world.

More: There's a Marmite shortage because of Brexit and people are freaking out

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