Lens and Mirrors Flashcards
1
Q
Snell’s law
A
n1 sin(angle 1) = n2 sin(angle 2)
n = index of refraction
n2 > n1 bend towards normal
n2 < n1 bend away from normal
2
Q
f +
A
f = focal length
converging
3
Q
f -
A
f = focal length
diverging
4
Q
i +
A
image is in front of mirror
real image
*true for lens as well (image is on other side of lens)
5
Q
i -
A
image is behind mirror
virtual image
*true for lens as well (image is on same side as light source)
6
Q
equation with i,f, and o
A
1/f = 1/i + 1/o
7
Q
convex mirror
A
diverging mirror
Always virtual, upright, reduced
UVR
8
Q
concave mirror object at f
A
converging mirror
no image formed
9
Q
m -
A
inverted
*for both lens and mirrors
10
Q
m +
A
upright
*for both lens and mirrors
11
Q
ImI < 1
A
reduced image
12
Q
ImI > 1
A
enlarged image
13
Q
equation for m
A
m = -i/o
14
Q
IR UV
A
Inverted = Real Upright = Virtual
15
Q
Focal length for mirrors
A
f = r/2 r = radius of curvature
