electromagnetic wave
Physics term for waves of electric and magnetic fields, such as radio waves, microwaves, visible light, X-rays, and gamma rays.
This device emits weak electromagnetic waves.
Electromagnetic waves include radio waves, light, X-rays, and so on.
Microwave ovens use electromagnetic waves to heat food.
Using a smartphone exposes you to electromagnetic waves.
Some people are said to be more susceptible to the effects of electromagnetic waves.
This case is treated to block electromagnetic waves.
光 is the everyday word for visible light, which is just one narrow band within the full range of 電磁波.
Compound of 電 (electricity) + 磁 (magnetism) + 波 (wave), directly translating the Western scientific term 'electromagnetic wave'.