A light beam is travelling from Region `I` to `IV` (figure). The refractive index in regionals `I,II,III` and `IV` are `n_0=(n_0)/(2)`(n_0)/(6) and (n_0)/(8)` respectively. The angle of incidence `theta` for which the beam just misses entering region IV is- `

A light beam is travelling from Region I to Region IV (Refer Figure). The refractive index in Regions I, II , III and IV are n_(0), (n_(0))/(2), (n_(0))/(6) and (n_(0))/(8), respectively. The angle of incidence theta for which the beam just misses entering Region IV is

A light beam is traveling from Region I to region IV (refer figure). The refractive indices in Region I, II, III, and IV are n_(0), n_(0)//2,n_(0)//6 and n_(0)//8 , respectively. The angle of incidence theta for which the beam just misses entering Region IV is

A light beam is traveling from Region I to region IV (refer figure). The refractive indices in Region I, II, III, and IV are n_(0), n_(0)//2,n_(0)//6 and n_(0)//8 , respectively. The angle of incidence theta for which the beam just misses entering Region IV is

A light beam is traveling from Region I to region IV (refer figure). The refractive indices in Region I, II, III, and IV are n_(0), n_(0)//2,n_(0)//6 and n_(0)//8 , respectively. The angle of incidence theta for which the beam just misses entering Region IV is

An intially parallel cyclindrical beam travels in a medium of refractive index mu (I) = mu_(0) + mu_(2) I , where mu_(0) and mu_(2) are positive constants and I is intensity of light beam. The intensity of the beam is decreasing with increasing radius. Answer the following questions : As the beam enters the medium, it will

An intially parallel cyclindrical beam travels in a medium of refractive index mu (I) = mu_(0) + mu_(2) I , where mu_(0) and mu_(2) are positive constants and I is intensity of light beam. The intensity of the beam is decreasing with increasing radius. Answer the following questions : As the beam enters the medium, it will

An intially parallel cyclindrical beam travels in a medium of refractive index mu (I) = mu_(0) + mu_(2) I , where mu_(0) and mu_(2) are positive constants and I is intensity of light beam. The intensity of the beam is decreasing with increasing radius. Answer the following questions : As the beam enters the medium, it will