Onion peels through the Foldscope at LGP26-B3
Jun 02, 2026 • 9:50 AM UTC
India
340x Magnification
Plants
Ishit001
Average Foldscope user
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Seeing an onion peel through the Foldscope!
Making the slide: I used a thin layer from the onion peel (known as the epidermis) on the slide. A piece of cello-tape (it is not ideal) was used to secure the onion peel to the glass-slide.
Preparing to observe: The slide was fitted into the foldscope and then the 50x,140x and the 340x magnification lens was used . On 340x, it is highly magnified and thus I also used the LED Illuminator to observe the sample more clearly. However, on 50x and 140x, the room lighting is sufficient for observing the samples.
Image:
Making the slide: I used a thin layer from the onion peel (known as the epidermis) on the slide. A piece of cello-tape (it is not ideal) was used to secure the onion peel to the glass-slide.
Preparing to observe: The slide was fitted into the foldscope and then the 50x,140x and the 340x magnification lens was used . On 340x, it is highly magnified and thus I also used the LED Illuminator to observe the sample more clearly. However, on 50x and 140x, the room lighting is sufficient for observing the samples.
Image:
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Observations: From the Image, I observed that the onion peel cells were like a stretched-hexagon arranged in a tightly-packed box like arrangement, like a brick wall. The cell wall of the individual cells is clearly visible. The nuclei of the cells can also been, but not very clearly as observing a nucleus requires more powerful microscopes with a higher magnification and a better resolution (the foldscope's resolution is ~2 micrometers). Also, there are some artifacts, like air bubbles and a few water droplets. The cells appear to be white in color because no stain was used but it was still clear enough. Then, the image was captured using a mobile phone camera. On lower resolutions, it appears to be like streaks as individual cells cannot be resolved.
Overall, it was quite interesting and exciting and fun to see onion peels under a foldscope and see its individual cells!
Overall, it was quite interesting and exciting and fun to see onion peels under a foldscope and see its individual cells!
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