Amazon's Great Indian Festival started on October 7 for Prime members and October 8 for all other users. Aside from electronic items, a wide range of other products are also being offered at discounted prices during the sale. Some of these products include home appliances like refrigerators, air conditioners, washing machines, microwave ovens, etc. Following are some of the best deals on refrigerators under Rs. 20,000 that you may not want to miss out on.

There is a great need in healthcare, nanotechnology and other areas to improve our ability to see tiny objects that elude even the most powerful optical systems.