Different types of electromagnetic wave have different uses and dangers. Radio waves are used for sending radio and television signals. They are also used to control radio-controlled toys ...

Today, radio continues to evolve as it competes with other technologies to attract and hold an audience. The first steps toward inventing radio involved discovering electromagnetic waves and their ...

THz waves, located in the far-infrared region of the electromagnetic spectrum, can be used to perform non-invasive imaging through opaque materials for security and quality control applications.