Pins inside and outside of beaker filled with water – 2012 sciphy practical

A pin in the beaker of water appears higher than its actual position due to refraction of light.

In this experiment, you have to adjust the pin at the cork to a suitable height, such that the pin and the image of the pin inside the beaker of water is aligned and that ‘pins at position of no parallax’ position.

The video below guides you in adjusting the height of the pins to locate correct height.