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In Young's interference experiment, the central bright fringe can be indentified due to the fact that it

1. Write four facts of Panama Canal.

Young' experiment proves which of the following fact:

Which of the following facts about Robert Hooke's experiment leading to discovery of cell is not correct?

While performing experiments with water, Jyoti observed that an empty steel bowl floats but a small iron nail sinks in water. This can be explained by the fact that