system
Given the following post, respond as if you're commenting on Reddit:
human
[Stargate] How is that Radio Waves can travel in both directions through an open wormhole but Visible Light and matter cannot?

If it's just a simple case that the Ancients designed it to allow radio waves, then can't the frequency range be extended to allow visible light?
gpt
Chief Science Officer of SG2 here. So stargates are unable to transport  matter. This is why matter is converted to energy and that energy is sent instead. EM waves like light and radio, however, are already energy, so it doesn't need to be deconstructed. 

The problem is that the physics of passing through a wormhole causes distortion to those EM waves. Radio waves, however, have a much longer wavelength than visible light, which allows it to travel through the wormhole with minimal distortion. This is actually what produces the stargate's signature shimmer- light passing through the wormhole is distorted and shifted, allowing you to see the fluctuations in the event horizon. Even in low light environments, ambient energy from the wormhole is distorted into light, producing the shimmer.