Mirrors Flashcards
Images can be either
Real or virtual
Real images are when
Light converges at the position of the image
Virtual images are when
Light appears to come
Plane mirrors always create
Virtual images
What is a virtual image?
Image is the same distance both behind the mirror and from the object
Spherical mirrors can be either
Concave or convex
Focal length is the
Distance between the focal point and the mirror
The focal point is where
All light converges
What is equation for focal length?
f = r / 2
How is the focal length for a concave mirror?
positive, +f
How is the focal length for a convex mirror?
negative, -f
Concave mirrors are known as
Converging mirrors
Convex mirrors are known as
Diverging mirrors
What is the radius of curvature (r)?
The distance between the mirror and the center of the object
d0 is the distance from the
Mirror to object
di is the distance from the
Mirror to image
What is the thin lens equation?
1 / f = 2 / r = 1 / o + 1 / i
What does the thin lens equation calculate?
Image distance of the object placed in front of a lens / mirror
Positive distance dictates a
Real image, one that is in front of the mirror
Negative distance dictates a
Virtual image, one that is behind the mirror
What is the equation for Magnification?
- i / o
A negative magnification results in a
Inverted image
A positive magnification results in a
Upright image
A converging mirror has what kind of focal length?
+f
A diverging mirror has what kind of focal length?
-f
How is the image if |m| < 1
Reduced
How is the image if |m| > 1
Enlarged
What is the relationship between lenses and light?
They refract light
What is the relationship between mirrors and light?
They reflect light
What is the Lensmaker equation?
1 / f = (n-1)(1/r - 1/r)
What is the equation of a lenses power?
P = 1 / f
Positive power means the lens is
Converging
Negative power means the lens is
Diverging
What is the equation used for lens with negligible distances?
1 / f = 1 / f + 1 / f
