The electric field of a plane electromagnetic wave, travelling in an unknown non-magnetic medium is given by, E y =20 sin (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 3×10⁸ m/s)

Electromagnetic Waves: JEE Main 2026 Physics question

JEE Main 2026 · 22 Jan, Morning shift · Q46

JEE Main 202622 Jan, Morning shiftPhysicsMediumElectromagnetic Waves120× since 2002

The electric field of a plane electromagnetic wave, travelling in an unknown non-magnetic medium is given by,

E_y=20\sin(3\times10^{6}x-4.5\times10^{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\times10^8

m/s)

Your answerType your answer. Integers and decimals are accepted.

JEE Main 2026 Electromagnetic Waves Question with Solution (22 Jan Morning shift, Q46) | JEE Arc