We must find the minimum incidence angle of ray if it is to emerge from the opposite side and not to be internally reflected.
Answer to Problem 81GP
Solution:
Explanation of Solution
When there is maximum deviation, the ray would get totally internally reflected. So, for making the incidence ray minimum such as that the ray emerged from other side, we should keep deviation minimum.
Given:
Angle of prism
Refractive index of prism
Formula used:
Snell’s law
In a triangle, internal angle= sum of opposite external angles
Calculation:
For minimum incidence angle, the emergent angle should be maximum i.e. 90o
Using Snell’s law:
Chapter 23 Solutions
Physics: Principles with Applications
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