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

""_(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

""_(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

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

If 2mu_1xx _3mu_2 xx _4mu_3 is equal to

If mu_(1) and mu_(2) are aboslute refractive index of medium 1 and medium 2 respectively, then

If mu_(1) and mu_(2) are aboslute refractive index of medium 1 and medium 2 respectively, then