Refraction using Snell's law - critical angles

Click For Summary
SUMMARY

The discussion confirms that a critical angle does not exist when light transitions from water (refractive index n=1.33) to glass (n=1.5). This conclusion is derived using Snell's Law, which indicates that total internal reflection (TIR) can only occur when light moves from a denser medium to a rarer medium. Therefore, the assertion that no critical angle can be calculated in this scenario is accurate.

PREREQUISITES
  • Understanding of Snell's Law
  • Knowledge of refractive indices
  • Familiarity with the concept of total internal reflection (TIR)
  • Basic principles of optics
NEXT STEPS
  • Study the derivation and applications of Snell's Law in different media
  • Explore the concept of total internal reflection in optical fibers
  • Investigate the refractive indices of various materials
  • Learn about critical angles in other medium transitions, such as air to water
USEFUL FOR

Students of physics, optical engineers, and anyone interested in the principles of light refraction and total internal reflection.

jsalapide
Messages
39
Reaction score
0
Is it possible for the critical angle to exist when light goes from water (n=1.33) into glass (n=1.5)?

I solved this using snell's law.

and my answer is no..
because glass has greater refraction index than water. And when you use snell's law and solve for the critical angle, there will be no value.

is my answer right?
 
Last edited:
Physics news on Phys.org


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

I solved this using snell's law.

and my answer is no..
because glass has greater refraction index than water. And when you use snell's law and solve for the critical angle, there will be no value.

is my answer right?

You are right.
 


yes, there is TIR only on going from denser to a rarer medium. your calculation is right.
 

Similar threads

  • · Replies 1 ·
Replies
1
Views
2K
  • · Replies 1 ·
Replies
1
Views
962
  • · Replies 5 ·
Replies
5
Views
3K
  • · Replies 8 ·
Replies
8
Views
5K
  • · Replies 3 ·
Replies
3
Views
2K
  • · Replies 5 ·
Replies
5
Views
2K
  • · Replies 2 ·
Replies
2
Views
2K
Replies
6
Views
2K
  • · Replies 1 ·
Replies
1
Views
2K
  • · Replies 4 ·
Replies
4
Views
704