English: So, what is it a very good approximation of or n E n−1something at n-1/2.ε ( ) 0 ΔtE −E→n →n−1= ∇ × H→ n−1/2 What will be the now the rest is easy the what will be the second equation imply.
Telugu: μ0→μ0( ) − ΔtH −H→n+1/2 →n−1/2= ∇ × E→n కాబట్టి, ఇక్కడ మంచి అప్రక్సీమేషన్ ఏమి ఉంటుంది.