# Joint Entrance Examination/2000 Screening/Q033 Glass slab in water and total internal reflection

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| Original Question by Dharav Here's the question... A rectangular glass slab ABCD of refractive index n 1 is immersed in water of refractive index n2 (n1 > n2). A ray of light is incident at the surface AB of the slab as shown. The maximum value of the angle of incidence α$_{max}$, such that the ray comes out only from the other surface CD, is given by... $\sin ^{-1}{\frac {n_{1}}{n_{2}}}\cos \left(\sin ^{-1}{\frac {n_{2}}{n_{1}}}\right)$ $\sin ^{-1}\left[n_{1}\cos \left(\sin ^{-1}{\frac {1}{n_{2}}}\right)\right]$ $\sin ^{-1}{\frac {n_{1}}{n_{2}}}$ $\sin ^{-1}{\frac {n_{2}}{n_{1}}}$ Posted by Dharav 07:16, 18 August 2009 (UTC) | What's Up? Latest discussions on the forum Optics-Help Joint Entrance Examination/2000 Screening/Q030 Hollow Double Convex Lens with variable liquids inside Joint Entrance Examination/2000 Screening/Q032 Divergent beam passsing from a glass slab Joint Entrance Examination/2000 Screening/Q033 Glass slab in water and total internal reflection User:Thewinster/HHF/Optics-Preload Joint Entrance Examination/AIEEE 2009/Q076 WAVE OPTICS Physics-Help User:Thewinster/Sandbox/Forum-Watch User:Thewinster/Sandbox Joint Entrance Examination/2000 Screening/Q031 Magnetic fields of parallel wires Joint Entrance Examination/2000 Screening/Q002 Uniform time varying magnetic field and induced electric field Joint Entrance Examination/2000 Screening/Q009 Magnetic field ratios in two different cases |
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