Light and Opitcs Flashcards
do
Distance from mirror to object
di
Distance from mirror to image
f
focal length
ho
object height
hi
image height
Is focal length negative or positive for concave mirrors?
positive
Negative or positive focal lenth for convex mirrors?
Negative
-magnification inverted or upright?
Inverted
+magnification inverted or upright?
Upright
+di real or virtual image?
Real
-di real or virtual image?
virtual (behind mirror)
+do real or virtual image?
Real
-do real or virtual image?
Virtual (behind mirror)
3 principal rays for Concave Mirror
- In parallel, out F
- In F, out parallel
- In C, out back it’s incoming path
3 Principal rays for Convex Mirror
- In parallel, out as though it came from F
- In as though it is going to F, out parallel
- In as going to C, back along incoming path
Refraction: Light enters medium where speed _____, bent toward normal.
Decreases
Refraction: Light enters medium where speed increases, bent _____ normal.
Away
Are direction of propagation and index of refraction directly or inversely relate?
Directly