Optics Flashcards
(31 cards)
1
Q
Red
A
650-750
2
Q
Orange
A
592-650
3
Q
Yellow
A
560-592
4
Q
Green
A
500-560
5
Q
Blue
A
446-500
6
Q
Violet
A
400-446
7
Q
Conventions for light rays
A
Travel from left to right
Travel away from the source
Can be acted upon by mirrors, lenses and prisms
8
Q
Index of refraction
Glass
A
1.523
9
Q
Air
A
1.00
10
Q
Cornea
A
1.376
11
Q
CR39
A
1.50
12
Q
Polycarbonate
A
1.586
13
Q
Trivex
A
1.53
14
Q
Crown glass
A
1.53
15
Q
Converging lenses
A
Plus lenses
Convex lens (base to base)
16
Q
Diverging lenses
A
Minus lens
Concave lens (apex to apex?
17
Q
Minus space
A
In front of lens
18
Q
Plus space
A
Behind the lens
19
Q
Real imagie
A
Plus/convex
20
Q
Virtual image
A
Minus/concave
21
Q
Focal length formula
A
D=1/f
22
Q
Surface power formula
A
F1=n’-n/r
23
Q
Nominal power formula
A
Ft=f1+f2
24
Q
Spherocylinder approximation
A
F0= FcylSin^2°+Fsph
25
Prentices formula
P=cD
P=cF
26
Sagittal depth formula
Sag=r squareroot r2-(d/2)^2
27
Approximate sag formula
Sag= (d/2)^2D/2000(n-1)
28
Vergence power of lens
U+P = V
29
Distance of the object from the lens
U=1/u
30
Distance of the image from the lens
V=1/v
31
T/F
Light travels slowest in crown glass
True
