পদার্থবিজ্ঞান প্রশ্ন

The light from a 10mW laser is concentrated on a 2mm2 area. What is the maximum value of corresponding sinusoidal electric field?  ϵ0=8.854×1012Fm−1andμ0=4π×10−7Hm−1\epsilon_0=8.854\times 10^{12} F m^{-1} \text{and} \mu_0=4\pi \times10^-7 Hm^{-1}