We can't hear light waves because hearing and vision are two different sensory systems that operate through different mechanisms.
Sound waves are mechanical vibrations that propagate through a medium, such as air or water. When these waves reach our ears, they cause the eardrum to vibrate, which in turn sets off a chain of events that ultimately results in the perception of sound in our brain.
On the other hand, light waves are part of the electromagnetic spectrum, which consists of a range of wavelengths including visible light, radio waves, microwaves, infrared, ultraviolet, X-rays, and gamma rays. Our eyes are specifically adapted to detect and interpret the visible light portion of the electromagnetic spectrum.
The human eye contains specialized cells called photoreceptors, located in the retina at the back of the eye. These photoreceptor cells, known as rods and cones, respond to different wavelengths of light and convert them into electrical signals. These signals are then transmitted to the brain via the optic nerve, where they are interpreted as visual information.
While sound waves and light waves are both forms of energy, they interact with our sensory systems in fundamentally different ways. Our auditory system is designed to detect and process mechanical vibrations, enabling us to perceive sound, while our visual system is specialized for detecting and interpreting electromagnetic radiation in the form of light, allowing us to perceive the visual world around us.