Q14. In the given electromagnetic wave $\mathrm { E } _ { \mathrm { y } } = 600 \sin ( \omega \mathrm { t } - \mathrm { kx } ) \mathrm { Vm } ^ { - 1 }$, intensity of the associated light beam is (in $\mathrm { W } / \mathrm { m } ^ { 2 } : \left( \right.$ Given $\left. \epsilon _ { 0 } = 9 \times 10 ^ { - 12 } \mathrm { C } ^ { 2 } \mathrm {~N} ^ { - 1 } \mathrm {~m} ^ { - 2 } \right)$\\
(1) 243\\
(2) 729\\
(3) 972\\
(4) 486