Here is the poster which gives an overview of Quantum phenomena:

We put up two experiments in optics:

1. Diffraction by hair strand
2. Imaging by lens

Traditionally, we are introduced to diffraction and interference phenomena by the Young’s double slit experiment. In colleges, we perform this experiment by using very precisely manufactured slits which creates the illusion in the minds of students that the effect can be seen only in sophisticated lab environment. However, we are all carrying multiple “slits” with us, our hair strands! Hold a single hair strand in the laser beam and be amazed by the optical phenomenon. (In fact, I performed this experiment in school and calculated the diameter of my hair strand, visit this blog post to know more).

The other setup consisted of a lens and an object, the image was formed at the suitable location as determined by the lens formula. The object, lens, and screen were placed on an optical stage and students were encouraged to move them around to locate the exact position for proper image formation. To further increase the interactivity, the students would draw some figures (flowers, smileys, stars etc) on transparency sheets with permanent markers and then use them as the “object” for image formation.

Here are some images of the stall:

On the whole, it was an enriching experience to interact with young school children and see the joy on their faces after seeing the optical phenomena in action.

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