The correct answer is A, because the electromagnetic spectrum is wave energy, not mechanical waves, it travels through a vacuum. Only a very small portion of components are visible to the human eye. Not all components are dangerous to the human body. The components slow down as they enter water.
The correct answer is A, because the electromagnetic spectrum is wave energy, not mechanical waves, it travels through a vacuum. Only a very small portion of components are visible to the human eye. Not all components are dangerous to the human body. The components slow down as they enter water.