Are radio waves blocked or unblocked?

Radio waves can be both blocked and unblocked, depending on various factors such as frequency, obstacles, and environmental conditions. Low-frequency radio waves can penetrate through buildings and other obstacles, while higher frequency waves may be more easily absorbed or reflected by materials like concrete or metal. Additionally, factors like weather and terrain can also influence the propagation of radio waves. Overall, their ability to travel can vary significantly based on the surrounding environment.