An infrared radiation of 100 GHz frequency is travelling in free space along the x-direction. At a particular point in space and time, the electric field is along y-axis having a magnitude of 9.3 V/m⁻¹. The magnetic field at this point is

Correct option is B

Correct answer is B
Explanation:
Given:
Frequency of the infrared radiation = 100 GHz (not directly needed for calculation).
Electric field magnitude {E) = 9.3 V/m.
Speed of light {c) = 3 × 108 m/s.
To find the magnetic field magnitude {B):
B = E/c ⇒ B = 9.3/(3 × 108) T
B = 3.1 × 10-8 T
Direction of the magnetic field: Since the wave is traveling in the x-direction and the electric field is along the y-axis, the magnetic field will be along the z-axis.