Today we will make two Mobius Strips – one without ANY twist and the other with a TWIST and then try and understand their topology. You need color paper strips, cello tape, glue and scissors. Stick a yellow and red strip in the center to make a CROSS – like a PLUS sign. Make two such CROSSES. In both crosses we will tape the RED strips without and twist. However in the first cross we will tap the YELLOW strip without and twist, but in the second cross we will give the YELLOW strip a TWIST (by 180-degrees). ONE has NO TWIST, but TWO has a TWIST. Now cut the red strip of ONE along the midline and this is what you will get. Now cut the red strip of TWO along the midline and you will see that the RED rings are UPSIDE DOWN. Now place both squares side by side to understand the topology. In ONE without a twist both YELLOW strips are below the red strips. However, in the case of the TWISTED model one Yellow is above the red strip while the other is below the red strip. This happened because of the TWIST in model number TWO.
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
Dubbed in Bengali by Krishnanjan Mondal from Pratham's Science Learning Program 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
Dual Mobius Strip Topology | Bengali
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