Can a Critical Angle Occur When Light Passes from Water to Glass?

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SUMMARY

The discussion confirms that a critical angle can occur when light transitions from water (n=1.33) to glass (n=1.5). The critical angle is calculated using the formula sin(critical angle) = n1/n2, where n1 represents the refractive index of water and n2 represents that of glass. Total internal reflection is only possible when light travels from a medium with a higher refractive index to one with a lower refractive index, which is not the case in this scenario.

PREREQUISITES
  • Understanding of refractive indices (n) in optics
  • Knowledge of the critical angle concept in physics
  • Familiarity with the formula for calculating critical angles
  • Basic principles of total internal reflection
NEXT STEPS
  • Study the derivation and applications of Snell's Law in optics
  • Explore the concept of total internal reflection in different mediums
  • Learn about the refractive indices of various materials
  • Investigate practical applications of critical angles in fiber optics
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Physics students, optical engineers, and anyone interested in the principles of light behavior at material boundaries.

jsalapide
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Is it possible for the critical angle to exist when light goes from water (n=1.33) into glass (n=1.5)?

My used the formula sin(critical angle) = n1/n2.

I'm a bit confused, should the numerator(n1) always be less dense compared to the denominator(n2).
 
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Total internal reflection occurs at the boundary of light in a higher n meeting a material of lower n
 

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