The speed of light in a vacuum is approximately 299,792,458 meters per second (or about 186,282 miles per second). This speed, denoted by the symbol 'c,' is a fundamental constant in physics and plays a crucial role in many scientific theories and equations.
Radio waves, which are a form of electromagnetic radiation, also travel at the speed of light in a vacuum. Therefore, the speed of radio waves is the same as the speed of light, approximately 299,792,458 meters per second.
On the other hand, the speed of sound depends on the medium through which it travels. In air at room temperature, sound travels at approximately 343 meters per second (or about 767 miles per hour). However, the speed of sound can vary depending on factors like temperature, humidity, and the composition of the medium. For example, sound travels faster through solids and liquids compared to gases.
It's worth noting that the speeds of light, radio waves, and sound waves can differ in different materials or mediums due to their varying properties and interaction with the medium. The values mentioned above correspond to their speeds in a vacuum or under typical conditions.