`""_(i)u_(j)` represents refractive index when a light ray goes from medium I to medium j, then the product `""_(2)µ_(1)xx``""_(3)µ_(2)xx``""_(4)µ_(2)` is equal to

""_(i)u_(j) represents refractive index when a light ray goes from medium I to medium j, then the product ""_(2)µ_(1)xx ""_(3)µ_(2)xx ""_(4)µ_(3) is equal to

If ._(i)mu_(j) represents refractive index when a light ray goes from mefium i to medium j , then the product ._(2)mu_(1)xx._(3)mu_(2)xx._(4)mu_(3) is equal to

If ._(i)mu_(j) represents refractive index when a light ray goes from mefium i to medium j , then the product ._(2)mu_(1)xx._(3)mu_(2)xx._(4)mu_(3) is equal to

If ""_(x) mu_(y) represents the refractive index when a ray of light goes from medium x to medium y , then the product ""_(2) mu_(1) xx ""_(3) mu_(2) xx ""_(4) mu_(3) is equal to

If imu_j represents refractive index,when a light ray goes from medium i to medum j,then the product ^ 2mu_1 xx ^3mu_2 xx ^4mu_3 is equal to

If ._imu_j represnts the refractive index when a ray of light goes from medium i to j, then the product ._2mu_1xx._1mu_3xx._3mu_4 is equal to

When a ray of light passes from air medium to denser medium then the refractive index is

A ray of light in incidentin medium 1 on a surface that separates medium 1 from medium 2 . Let v_(1) and v_(2) represent the velocity of light in medium 1 and medium 2 respectively . Also let n_(12) and n_(21) represent the refractive index of medium 1 with respect to medium 2 and refractive index of medium 2 with respect to medium 1, respectively. if 1 and r denote the angle of incidence and angle fo refraction, then -