Is there a maximal finite depth infinite index irreducible subfactor?

Lenses and Refractive index's. please help so confused?

• Answer:

  • The apparent depth of the bottom surface t1 as viewed from the water surface is given by t/ t1 = (μg/ μw) where t is the thickness of the glass plate. •or t1 = μw* t / μg • The apparent depth of the bottom surface as viewed from the air is (h + t1) = μw h1 where h is the depth of water. h1 = (h + t1)/ μw • ------------------------------------ • The apparent depth of the top surface of the glass as viewed from the air is h2 =h / μw ------------------------------------- h1 – h2 = (h + t1)/ μw - h / μw h1 – h2 = t1 / μw h1 – h2 = { μw* t /( μg) }/ μw = t / μg = 9 / 1.5 = 6 cm --------------------------- The apparent thickness of the glass plate is 6 cm ===============================