![foone on Twitter: "but you aren't realistically going to see Cherenkov radiation in the air. The index of refraction is too low, so the particles would to be going REALLY REALLY FAST. foone on Twitter: "but you aren't realistically going to see Cherenkov radiation in the air. The index of refraction is too low, so the particles would to be going REALLY REALLY FAST.](https://pbs.twimg.com/media/Emp0vMOUwAA4P8S.jpg)
foone on Twitter: "but you aren't realistically going to see Cherenkov radiation in the air. The index of refraction is too low, so the particles would to be going REALLY REALLY FAST.
![Experimentally Observed Cherenkov Light Generation in the Eye During Radiation Therapy - International Journal of Radiation Oncology, Biology, Physics Experimentally Observed Cherenkov Light Generation in the Eye During Radiation Therapy - International Journal of Radiation Oncology, Biology, Physics](https://els-jbs-prod-cdn.jbs.elsevierhealth.com/cms/attachment/c3fca365-9a1a-4ab7-942f-8a010ca6c347/gr1_lrg.jpg)
Experimentally Observed Cherenkov Light Generation in the Eye During Radiation Therapy - International Journal of Radiation Oncology, Biology, Physics
![When high velocity particles travel faster than the speed of light in a medium they create a blue flash. This is called Cerenkov Radiation, why does this happen and why is it When high velocity particles travel faster than the speed of light in a medium they create a blue flash. This is called Cerenkov Radiation, why does this happen and why is it](https://www.physlink.com/education/askexperts/Images/ae219a.jpg)
When high velocity particles travel faster than the speed of light in a medium they create a blue flash. This is called Cerenkov Radiation, why does this happen and why is it
![A scientific first: Team engineers photograph radiation beams in human body through Cherenkov effect A scientific first: Team engineers photograph radiation beams in human body through Cherenkov effect](https://scx1.b-cdn.net/csz/news/800a/2014/ascientificf.jpg)
A scientific first: Team engineers photograph radiation beams in human body through Cherenkov effect
![The blue from Cherenkov radiation at the OPAL reactor | Science nature, Industrial photography, Science and technology The blue from Cherenkov radiation at the OPAL reactor | Science nature, Industrial photography, Science and technology](https://i.pinimg.com/originals/42/83/17/42831700faac85d94da6a9077f60eae5.jpg)