The electric field of a plane electromagnetic wave, travelling in an unknown nonmagnetic medium is given by, E_{y}=20 \sin (3 \times 10^6 x-4.5 \times 10^{14} t) V \/ m (where x, t and other values have S.I. units). The dielectric constant of the medium is \_\_\_\_ (speed of light in free space is 3 \times 10^8 m \/ s ) [22 Jan 2026 Shift 1]

Electromagnetic Waves Part 2

Section: Physics

Question : 8 of 54

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The electric field of a plane electromagnetic wave, travelling in an unknown nonmagnetic medium is given by,
Ey=20sin‌(3×106x−4.5×1014t)V∕m
(where x,t and other values have S.I. units). The dielectric constant of the medium is ____
(speed of light in free space is 3×108m∕s )

[22 Jan 2026 Shift 1]

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