Upcoming SlideShare
×

# Snell's law

7,845 views

Published on

1 Comment
18 Likes
Statistics
Notes
• Full Name
Comment goes here.

Are you sure you want to Yes No
• sana pede itong i save

Are you sure you want to  Yes  No
Views
Total views
7,845
On SlideShare
0
From Embeds
0
Number of Embeds
30
Actions
Shares
0
0
1
Likes
18
Embeds 0
No embeds

No notes for slide

### Snell's law

1. 1. Total Internal Reflection
2. 2. Total Internal Reflection <ul><li>Occurs when light reflects off of the inside wall of a denser medium (higher index of refraction ) </li></ul>
3. 3. <ul><li>Recall: </li></ul><ul><li>When light passes from a dense material into a less dense medium, light reflects away from the normal </li></ul>Total Internal Reflection
4. 4. <ul><li>As the angle of incidence increases , the angle of refraction increases </li></ul>Total Internal Reflection
5. 5. Critical Angle <ul><li>At a certain angle, the refracted ray follows a path exactly along the surface of the dense medium </li></ul><ul><li>This angle is called the “ critical angle ” </li></ul>
6. 6. Critical Angle <ul><li>If the incident ray is increased beyond the critical angle, the light is no longer refracted </li></ul><ul><li>Instead, it is reflected back inside the medium </li></ul><ul><li>This is called “ total internal reflection ” </li></ul>
7. 10. Mirages <ul><li>Formed by both Total Internal Reflection and Refraction </li></ul><ul><li>Produced when light passes through layers of air with different densities </li></ul>
8. 11. Mirage
9. 12. Snell’s Law
10. 13. Willebrord Snell <ul><li>Dutch astronomer & mathematician </li></ul><ul><li>Identified the exact relationship between the angle of incidence and angle of reflection </li></ul>
11. 14. Snell’s Law <ul><li>n 1 = index of refraction for medium 1 </li></ul><ul><li>n 2 = index of refraction for medium 2 </li></ul><ul><li> 1 = angle of incidence </li></ul><ul><li> 2 = angle of refraction </li></ul>