What are the speeds of radio waves in a vacuum and of gamma rays in a vacuum?
- Aspeed of radio waves: less than $3.0 \times 10^8\ \text{m s}^{-1}$; speed of gamma rays: less than $3.0 \times 10^8\ \text{m s}^{-1}$
- Bspeed of radio waves: less than $3.0 \times 10^8\ \text{m s}^{-1}$; speed of gamma rays: more than $3.0 \times 10^8\ \text{m s}^{-1}$
- Cspeed of radio waves: $3.0 \times 10^8\ \text{m s}^{-1}$; speed of gamma rays: $3.0 \times 10^8\ \text{m s}^{-1}$
- Dspeed of radio waves: more than $3.0 \times 10^8\ \text{m s}^{-1}$; speed of gamma rays: more than $3.0 \times 10^8\ \text{m s}^{-1}$