Answer:
The magnetic field

Step-by-step explanation:
From the question we are told that
The wavelength is

The intensity is

The time is

Generally radiation intensity is mathematically represented as

Where c is the speed of light with a constant value of

is the electric field
is the permittivity of free space with a constant value of
Making
the subject of the formula we have

Substituting values


Generally electric and magnetic field are related by the mathematical equation as follows

Where
is the magnetic field
making
the subject

Substituting values


Next is to obtain the wave number
Generally the wave number is mathematically represented as

Substituting values


Next is to obtain the frequency
Generally the frequency f is mathematically represented as

Substituting values

Next is to obtain the angular velocity
Generally the angular velocity
is mathematically represented as



Generally the sinusoidal electromagnetic waves for the magnetic field B moving in the positive z direction is expressed as

Since the magnetic field is induced at the origin then the equation above is reduced to

x =0 because it is the origin we are considering
Substituting values

