# Joint Entrance Examination/2000 Screening/Q032 Divergent beam passsing from a glass slab

 Welcome to the Highschool Help Forum! The forum is currently in "Beta" stage of development. You can ask questions and answer/discuss them. The basic functionalities are present. What's required is a more aesthetic look to the Static pages and a more user friendly setup. This will happen over the time gradually as we start creating some content. The site has a lot of tools, like posting mathematical calculations, images and diagrams; categorizing questions and so on. Having them here is NO GOOD unless you know how to use them. I am thoroughly against compiling a list of these features and then writing about them. As soon as you do not understand how to do something or use a certain feature, report that on "How To"s Section of the forum. Your queries will be answered there. If you have any ideas/discussion regarding the site/comments, please go to Discussions regarding Highschool Help Forum Lastly, thanks for joining in the site's development process! It matters!

#### Browse All Available Categories

Physics: Introductory PhysicsMechanicsHeatWaves and OscillationsElectricity And MagnetismOpticsModern Physics
Mathematics: AlgebraTrigonometryCo-Ordinate (Analytical) GeometryCalculusVectors And 3D GeometryMiscellaneous Topics
Chemistry: General Chemistry and Physical ChemistryOrganic ChemistryInorganic Chemistry
Biology: General BiologyAnatomyPhysiologyBotanyZoology

# Original Question by Dharav talk

Here's the question...
 A diverging beam of light from a point source S having divrgence angle α falls symmetrically on a glass slab as shown. The angles of incidence of the two extreme rays are equal. If the thickness of the glass slab is t and its refractive index is n, then the divergence angle of the emergent beam is (A) Zero (B) α (C) sin-l(1/n) (D) 2sin-l(1/n) Posted by Dharav talk 05:21, 18 August 2009 (UTC)

## What's Up?

Latest discussions on the forum

Optics-Help

Physics-Help

 a a