Vergence Flashcards
Law of Reflection
i=-i’
Law of Refraction
Snell’s Law: nsini=n’sinr
In Law of Refraction: when does light slows down?
from low density to high density
In Law of Refraction: when does light increases?
from higher density to lowest
Law of refraction: As ray refracted ray bends away, the greater the…
incident angle
Angle that causes the refracted angle to be 90 degrees (occurs for light traveling from higher index to lower)
Critical angle
What occurs when the incident angles is greater than the critical angle?
Total Internal Reflection
Determine the incident ray (critical angle) when the refracted angle = 90. The index of refraction of spectacle crown glass is n=1.523 and for air, n=1.00.
Incident angle= 41.04 degrees
Vergence
Numerical description of light’s position in time and space
How much is the vergence of parallel light?
0
What type of light does normal objects emit?
Diverge light
Unit of vergence
Diopter
Determine the vergence of a ray with a radius of curvature of 5cm in air (n=1.00).
-20D
Distances measure against direction of light have a….
negative value
Distances measure in same direction of light have a
positive value
