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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
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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