[rngname22]

Is there a way to like emit energy in a narrow beam from a bunch of different angles around a central target such that they only overlap in the center/target and the frequencies resonate in that location in such a way to reach a higher frequency past which there is a destructive effect but below which is safe and non-destructive?

/knows nothing about physics

[at_a_remove]

I understand what you are getting at, but the short answer is no.

The longer answer is something called The Superposition Principle. Essentially, waves (photons) pass through one another. The amplitude adds, but only at the intersection. The frequency does not change. (Consider the laser as the ultimate example of this)

(Side note: The superposition principle does not always hold; however, the realms where the addition of MOAR PHOTONZ becomes non-linear are broadly incompatible with life)

So, most techniques involve having many, many beams intersect so that the individual paths are only a little damaged while a specific spot where they all meet takes the hit. I met someone who specifically programs the machines that do this because there's a lot of math involved chucking radiation around irregular hunks of blood, meat, and bone, and the calculations are done because the first idea of "just cross the streams" works fine in a vacuum, but not so much in the human body.

[thfuran]

They're generally delivered sequentially rather than simultaneously, but that is standard practice. It means you can concentrate the dose in the target area, but constructive interference affects only intensity, not frequency. And photons will still interact pretty evenly along the whole path.

[dekhn]

https://en.wikipedia.org/wiki/Radiosurgery there is a subtype called Gamma Knife which uses a large collection of emitters to effectively target a location while keeping other locations under a specific radiation threshold.

[csdvrx]

Yes, there is beam forming.

Do a websearch about MIMO and beamforming, or ask Bing chatgpt to explain it.