This video shows how cards with different shaped holes circle, square, triangle), held to the sun, produce circular points of light, because what is seen is the image of the sun (this is how a pinhole camera works).

Shefali engages with customers, media and investors to help to grow the company.  Shefali works at Oxford Space Systems, a company developing innovative technology that is launched into space.  She often helps to act as the link between customers and the engineers working on the satellite designs. 

The video shows a deck of cards being dealt between four people. The cards are handed out at a constant rate. The challenge is to graph the number of cards per person (‘size of hand’) against time.

Size of hand video