Deviation in refraction and TIR

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SUMMARY

The discussion centers on calculating the range of angle of deviation when light transitions from glass (n=1.5) to water (n=1.33). The lowest angle of deviation is confirmed to be 0° when the angle of incidence (i) is 0°. The highest angle of deviation remains undetermined, with participants suggesting calculations at specific angles of incidence, such as 20° and 40°, to explore the conditions for total internal reflection (TIR) and refraction.

PREREQUISITES
  • Understanding of Snell's Law
  • Knowledge of refractive indices (n=1.5 for glass, n=1.33 for water)
  • Familiarity with the concept of total internal reflection (TIR)
  • Basic trigonometry for angle calculations
NEXT STEPS
  • Calculate angles of deviation using Snell's Law for various angles of incidence
  • Investigate the conditions for total internal reflection (TIR) between glass and water
  • Explore the concept of critical angle in refraction scenarios
  • Review practical applications of refraction in optical devices
USEFUL FOR

Students studying optics, physics educators, and anyone interested in the principles of light behavior at material interfaces.

Jon Drake
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Homework Statement


Light is incident from glass (n=1.5) to water (n=1.33). Find out the range of angle of deviation for which there are two angles of incidence.

Homework Equations


Snell's Law

The Attempt at a Solution

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The lowest value of angle of deviation would be 0° when i = 0. But, I am unable to find the highest value. Would it be during refraction or TIR?
 
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Someone please help.
 
Jon Drake said:
Someone please help.
Calculate a couple of angles of deviation - perhaps with angle of incidence 20 and 40 degrees (assuming they are both below the TIR situation) - and then you may see which way to proceed.
 

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