Question

Let a1, a2, ......, a10 be in AP and h1, h2, ....., h10 be in HP. If a1 = h1 = 2 and a10 - h10 = 3,then a4h7 is (a) 2 (b) 3 (c) 5(d) 6

Answer 1

E is the electric field vector, and B is the magnetic field vector of the EM wave. For electromagnetic waves E and B are always perpendicular to each other and perpendicular to thedirection of propagation. ... The speed of any electromagnetic waves in free space is the speed of light c = 3*108m/s.