Question

what is resonance? explain with example

Answer 1

In physics, resonance is a phenomenon in which a vibrating system or external force drives another system to oscillate with greater amplitude at specific frequencies.   [ example ] A familiar example is a playground swing, which acts as a pendulum. Pushing a person in a swing in time with the natural interval of the swing (its resonant frequency) makes the swing go higher and higher (maximum amplitude), while attempts to push the swing at a faster or slower tempo produce smaller arcs. This is because the energy the swing absorbs is maximized when the pushes match the swing's natural oscillations.

Answer 2

Answer:

Resonance or mesomerism is delocalized electrons within certain molecules having conjugated double bonds, and the position of the double bond cannot be expressed by one single Lewis structure. A molecule or ion with such delocalized electrons is represented by several contributing structures(also called resonance structures or canonical structures).

1. Resonance is the ability of system to move its pi electrons in the system.

2. The delocalized electron when show movement contributing structures are prepared , this structures are called as resonating structures.

Example : Benzene shows resonance.