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Anne Marie Helmenstine, Ph.D.

Did You Know Bananas Glow?

By March 24, 2012

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Glowing Bananas (Xofc)

You find out some interesting things when you leave a black light lying around on the kitchen counter. If you read my blog, you already know bananas are slightly radioactive, but did you know the areas around the spots of ripe bananas glows blue under ultraviolet light? Now you do! If you want to check out other household items for a fluorescent glow, I have a list of things that glow under black light. If you are aware of anything I've missed, be sure to post a reply and I'll take a picture/add it to the list.

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March 22, 2010 at 5:58 pm
(1) kgress says:

Should uranium glass be on this list? My grandmother had a bunch of it!

March 22, 2010 at 7:45 pm
(2) chemistry says:

kgress, yes it should! Good call :-) I’ll add it to the list.

May 30, 2010 at 9:44 am
(3) Jacob Peacock says:

This also occurs in oranges after frost damage, as well as the inside of grapefruits. I have an article (peer review) about using fluorescence in oranges to analyze damage from frost. Although the article is interesting, it gives no insight as to what the compound causing the fluorescence is.

March 5, 2013 at 8:27 am
(4) ScienceFairBuddies says:

Apparently, I have tried both black lights and uv lights, and it won’t work. Can you help me?

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