Cool Colours | Bengali
Channel: Arvind Gupta
Date: 24/07/2016

You might have seen dark shadows but have you ever seen colorful shadows?
For this you’ll need some modern LED’s, their mount, sink and driver. Here you can see three LED colors – blue, green and red. Then you need cutouts of various shapes – a triangle, square and a circle. These card cutouts can be mounted on short sticks. Cutouts can have one, two, three or five holes.

If you bring your hand in front of the lighted LEDs and you will see some glorious colors. Bring a plastic bird or a pen and their shadows look out of this world. If you bring a card with a circle you will see shadows of three different colors. On moving the LED plate forwards and backwards you can see the colors combine and generate more complex colors. If you bring a flower shaped card with a circular hole than you can enjoy the mixing of colors. If you rotate a human cut-out you will many colors in a swirl. Similarly, try a Star cut-out. See colors rotate and mix.

Now try with a mount where the LEDs instead of being in a straight line are in a circle. Pass this light through a circular hole to see circles of three colors which in turn overlap and generate many more complex colors. The primary colors combine to make many secondary colors. Repeat this experiment with three and five circular holes to see astounding color combinations. 

Dubbed in Bengali by Krishnanjan Mondal from Pratham's Science Learning Program

This work is supported by IUCAA (www.iucaa.in) and TATA Trust (www.tata.com/aboutus/sub_index/Tata-trusts)

Credits:,Ashok Rupner, Manish Jain, Pradnya Pujari, Shivaji Mane, Jyoti Hiremath, Arvind Gupta, Vidula Mhaiskar TATA Trust: Education is one of the key focus areas for Tata Trusts, aiming towards enabling access of quality education to the underprivileged population in India. To facilitate quality in teaching and learning of Science education through workshops, capacity building and resource creation, Tata Trusts have been supporting Muktangan Vigyan Shodhika (MVS), IUCAA's Children’s Science Centre, since inception. To know more about other initiatives of Tata Trusts, please visit www.tatatrusts.org