Its appearance can be compared to the bow wave caused by a boat moving faster than the speed of water waves, or to a sonic boom. Discovered in 1934, and explained three years later by Frank and Tamm, its most frequent form is caused by [*] electrons 
Its appearance can be compared to the bow wave caused by a boat moving faster than the speed of water waves, or to a sonic boom. Discovered in 1934, and explained three years later by Frank and Tamm, its most frequent form is caused by [*] electrons traveling at speeds faster than the speed of light in water. For 10 points—name this form of radiation that appears as a weak bluish-white glow in pools of water shielding some nuclear reactors.
Its appearance can be compared to the bow wave caused by a boat moving faster than the speed of water waves, or to a sonic boom.
Cherenkov or Cerenkov radiation