PHYSICS

Blogger's note: The information I will be posting today aren't mine. They were all taken during our discussion in our Advanced Physics II class with Mr. Mohamad Ali Ramber. The pictures and animations aren't also mine. Credits to the rightful owners who placed it in google.

INDEX OF REFRACTION

Refraction is the bending of light.

• Light decreases speed as it enters water
• Light bends when it enters a region of different density.
• The two situations above are under the "optical density"

Formula of Index of Refraction: n = c/v where n= index of refraction, c=speed of light in vacuum (3.0x10⁸ m/s), v = speed of light in the medium

Indices of Refraction

1. Vacuum - 1.0000
2. Air - 1.0003
3. Water - 1.33
4. ethyl Alcohol - 1.36
5. Glass (fused quartz)  - 1.46
6. Crown Glass - 1.52
7. Light flint - 1.58
8. Flexiglass - 1.51
9. Sodium chloride - 1.53
10. Diamond - 2.42

Note that the index of refraction is NEVER less than the value of 1.

REFRACTION: SNELL'S LAW

• Light speed decreases if it travels from a region with lower than 1.0 index of refraction to a higher index of refraction.

Willebrord Snell in 1621

If n₂ < n₁, then θ₂ > θ₁ the ray then BENDS AWAY from the normal line.

Law of refraction: The incident and refracted rays lie in the same plane.

JUST FOR EMERGENCY AND FOR REMINDER IN CASE ANOTHER TEST LIKE THIS WILL BE GIVEN: