It's certainly not as bad as the problems generative AI tend to have, but it's still difficult to avoid strange and/or subtle biases.
Very promising technology, but likely to be good at diagnosing problems in Californian students and very hit-and-miss with demographics which don't tend to sign up for studies in silicon valley
No, it's not. In physics, we call the entire spectrum "light", because it's all fundamentally the same thing.
We can talk about "visible light", but that's a subset of light in general. Microwaves, radio waves, x-rays, gamma radiation, and any other section of the spectrum you can think of are all light