Question

A glass prism is in the shape of a quarter cylinder of length and radius , lying on a horizontal table. A uniform horizontal light beam fall on its vertical plane surfaces, as shown in figure. If a plane paper of width and length is placed at a distance from , then the fraction of light (in percentage) falling on the prism that will fall come out of prism is ______

Answer 1

The problem is unsolvable without the figure and refractive index of the prism.

Answer 2

The problem requires the figure to understand the geometry of the setup and the path of light rays. Additionally, the refractive index of the glass prism is needed to calculate the critical angle and determine the fraction of light that undergoes total internal reflection versus refraction.