(not finished) Flashcards
1
Q
What kind of lines does light propagate in?
A
Straight lines
2
Q
there are no distinguished places and directions in a…..
A
transparent, homogeneous, and isotropic medium
3
Q
What is the fundamental law of ray optics?
A
Fermat’s Principle
4
Q
What does Fermat’s Principal state?
A
it states that when light travels from point A to point B, it takes the path that takes the less time
5
Q
What is a consequence of Fermat’s principle?
A
Snell’s Law
6
Q
What is Snell’s Law?
A
the ratio of the sine of angle of incidence to the sine of angle of refraction equals the ratio of the speed of light in the corresponding media sin α/ sin β = c1/c2
7
Q
Convex lenses have…
A
a curved exterior
8
Q
Concave lenses have…
A
an inward interior of a circle or sphere
