= Ilya Frank
{c}
{tag=Physicist}
{wiki}
= Ilya Mikhailovich Frank
{c}
{synonym}
= Il’ja Mikhailovich Frank
{c}
{synonym}
= I. M. Frank
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{synonym}
<Ilya Frank> worked on the experiments and theoretical interpretation of <Cherenkov radiation>. With <Igor Tamm>, he explained in 1937 why radiation from a sufficiently fast charged particle adds coherently in a medium. The emission direction is linked to the particle's speed and the <refractive index>, so an observed optical pattern can carry particle-identification information. His later work also established a substantial programme in <neutron physics>.<Ilya Mikhailovich Frank: first FLNP JINR director, laureate of Nobel Prize by Joint Institute for Nuclear Research>[Participation in the liquid-irradiation work, 1937 theory and later neutron-physics programme]{ref}
A <physicist>.https://www.nobelprize.org/prizes/physics/1958/frank/biographical/[Independent professional profile]{ref}
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