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Time

Bengaluru | Oct 9, 2019
New Way to Determine Arrow of Time

One of the annoying side effects of being absorbed in a gripping novel is that the cup of tea on the table becomes cold! Unfortunately, the tea would not heat itself by absorbing the heat around it, just as pieces of a broken egg would not put themselves together or milk mixed in coffee would not separate by itself. Such things are irreversible, and define a fixed direction of time—that from the past towards the future. This apparent progression of time is called the ‘arrow of time’. In a recent study, Prof Mahendra Verma of the Indian Institute of Technology Kanpur, suggests a way, different from any previous ones,  to determine the direction in which time is progressing. He uses the concept of energy cascade to define the arrow of time.

General, Science, Technology, Deep-dive