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Question
The equation of a light wave is written as \[y = A \sin\left( kx - \omega t \right).\] Here, `y` represents _______ .
Options
displacement of ether particles
pressure in the medium
density of the medium
electric field
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Solution
electric field
Light consists of mutually perpendicular electric and magnetic fields. So, the equation of a light wave is represented by its field vector.
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