NDA General Ability Question (2026) — Solution

Step-by-step solution

In an electromagnetic wave, the electric field component is responsible for the optical effects. The force exerted by the electric field on the electrons in the retina is much greater than the force exerted by the magnetic field, since the magnetic field amplitude is B = E c and the velocity of electrons is much less than the speed of light c. Due to this, the electric vector is also known as the light vector. Therefore, the human eye is sensitive to the electric field only. Answer: electric field only