Friday, 31 March 2017

Sometimes, the glasses of the windows of a house are found to be shattered when large sounding bodies like aeroplane pass near the hose. Explain how?

Sometimes, the glasses of the windows of a house are found to be shattered when large sounding bodies like aeroplane pass near the hose. Explain how?
Ans: Every substance has its natural frequency of oscillation when it is set into vibrations, including glass. When the sound produced by anything match this frequency, the amplitude of vibration of glass will be very high, which brings shear to them. When the amount of shearing force exceeds the breaking force, they crack.
Sometimes the explosions can be such that the frequency of their sound matches this natural frequency, causing large scale vibration, at least for some time. This cracks them.

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