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salad in reply to @JurekB

If you shine a UV light at a ripe banana, it'll show up the browness in a violet colour. If you shine it at a bruised banana, it won't look any different. The reason for this is that there are some animals that have UV on their visible spectrum, and this allows them to identify which bananas are ripe to eat.

..you did just make that up, right?

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JurekB in reply to @salad

Nope. Try it.
Banana and UV light is all you need.
ETA - You'll have to trust me on the bit about animals having UV on their visible spectrum .
ETFA - Hint - Google 'banana & black light'.

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salad in reply to @JurekB

I meant the part about animals being able to see the UV spectrum 🙂

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