Answer:
The set up described in
the question is shown in Fig. 6(EP). 17. The full line circle represents cross
section of infinitely long cylinder of radius R. As the material is of refractive
index (- 1), therefore, ,. is positive
Also,
For the incoming ray along Y-axis from the lower plane,
total deviation of the out coming ray is .
The rays shall not reach the receiving plate if
(angles are measured clockwise from Y-axis)
Or
From Fig. 6(EP).17, sin ,
when small.
or
Hence, we conclude that for values of x lying between and ,
light emitted from the laser source shall not reach the upper receiving plane.
You need to login to perform this action.
You will be redirected in
3 sec