The electric field associated with an electromagnetic wave propagating in a dielectric medium is given by $\overrightarrow{\mathrm{E}}=30(2 \hat{\mathrm{x}}+\hat{\mathrm{y}}) \sin \left[2 \pi\left(5 \times 10^{14} \mathrm{t}-\frac{10^7}{3} \mathrm{z}\right)\right] \mathrm{Vm}^{-1}$. Which of the following option(s) is(are) correct?
[Given: The speed of light in vacuum, $\mathrm{c}=3 \times 10^8 \mathrm{~m} \mathrm{~s}^{-1}$ ]