The sunlight reaching the earth has maximum electric field of 810 V m–1. What is the maximum magnetic field in this light?
Given: Maximum electric field E0 = 810 V m-1.
The sunlight travels through vacuum in outer space to reach the earth. The magnetic field and electric field are related to each other and their relation is
where E0 is the amplitude of the electric field, C is the speed of light in vacuum and B0 is the amplitude of maximum magnetic field.
Thus the maximum magnetic field is
The maximum magnetic field is 2.7 μT.
1