5Locating an ImageWe can use light rays and the Law of Reflection to show where plane mirrors produce a virtual imagedistance from object to mirror is the same as from the mirror to imageThe object-image line is perpendicular to the mirrorLet’s take a look…
6Locating an ImageObject-image lineobjectimagenormals
7Try one yourself! Pick an object point Now draw in the light rays and find the image!Pick a view point
8Lateral InversionLet’s look at words in a plane mirror! Write your name in block letters and hold it up to the mirrorWhat do you see?What would this image look like?Z
9Lateral InversionIn a plane mirror, each letter is flipped horizontally and the letters are in reverse order.This property is called lateral inversion …but why would anybody use this?
11Image Characteristics Use the acronym “SALT” to examine properties of an image:S – Size of Image(compared to object – larger, smaller or same size)A – Attitude of Image (upright or inverted)L – Location of ImageT – Type of Image (real or virtual)
12Images in Plane Mirrors Compared to the object, an image in a plane mirror is always:S – the same sizeA – laterally invertedL – behind the mirror (same distance as object is to the mirror)T - virtual
13ActivityIn your lab group, work on Investigation 11.8 on Pg. 494And/orHmwk. Pg. 493 #1-5,7,9,10