A workshop named” Magnify Your Curiosity-Mathematics in a Laboratory with Foldscope” was organized by Department of Environmental Science, University of Calcutta on 12 ^th March 2019 at Gramya Hitakari Girls School, Howrah, West Bengal, India in collaboration with Howrah Vigyan Chetna Samannaya.

Introductory Session-

The workshop started with Dr.punarbasu Chaudhuri delivering a speech on Relative Size of Things and metric conversion of different units of length.

Introducing the macroscopic measuring tools-

After the introductory session, Dr. Punarbasu Chaudhuri demonstrated different length measuring devices such as Measuring tape, Ruler Scale, Vernier Scale, Screw Gauge their applications and limitations too.

Measurement session-

In this session, participants were asked to measure the thickness of their hair with a ruler scale. The measurement was done by coiling a single strand of hair around a plastic refill and measuring the total breadth. After this, the total length measured by ruler was divided by the total number of coils to get the value of a single hair strand.

Measurement of single hair strand using foldscope-

In this session, Stage Micrometer was introduced to the participants and by calibrating stage micrometre with a ruler scale (centimetre scale) we determined the width of a single strand of hair. It was also done at various portion of hair to get the range of the width of human hair.

Measurement of stomata-

A fresh leaf peel was taken on a slide and the length and breadth of stomata were measured using foldscope.

Caution-

During measurement using foldscope, the original images taken by smartphones has to be original images captured from a single device and not zoomed or cropped image.

Conclusion-

This was their first exposure to micrometry using foldscope and the event was a success.