What is the threshold velocity vthreshold(water) (i. e., the minimum velocity) for creating Cherenkov light from a charged particle as it travels through water (which has an index of refraction of n

Complete Question

The  complete question is shown on the first uploaded image  

A

B

C

The  correct option is  B  

Explanation:

From the question we are told that

      The refractive  index of water is  

      The  refractive  index of ethanol is  

Generally the threshold velocity for creating Cherenkov light   from a charged particle as it travels through water is mathematically evaluated as

Where  c is the speed of light with value  

Generally the threshold velocity for creating Cherenkov light   from a charged particle as it travels through water is mathematically evaluated as

  =>      

=>          

i believe the answer is a hope it and is correct