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प्रश्न
The equation of a light wave is written as \[y = A \sin\left( kx - \omega t \right).\] Here, `y` represents _______ .
विकल्प
displacement of ether particles
pressure in the medium
density of the medium
electric field
उत्तर
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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