Presentation on theme: "Images in Plane Mirrors. Remember this? Fallsview Casino Lucky Seven TV ad."— Presentation transcript:
Images in Plane Mirrors
Remember this? Fallsview Casino Lucky Seven TV ad
Virtual Image Appears to be a light source behind the mirror This is an apparent light source Light cant travel through mirror, so vase is a virtual (reflected) image
Virtual Image source apparent source mirror
Locating an Image We can use light rays and the Law of Reflection to show where plane mirrors produce a virtual image distance from object to mirror is the same as from the mirror to image The object-image line is perpendicular to the mirror Lets take a look…
Locating an Image object image Object- image line normals
Try one yourself! Pick an object point Pick a view point Now draw in the light rays and find the image!
Lateral Inversion Lets look at words in a plane mirror! Write your name in block letters and hold it up to the mirror What do you see? What would this image look like? Z
Lateral Inversion In 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?
Image 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 Image T – Type of Image (real or virtual)
Images in Plane Mirrors Compared to the object, an image in a plane mirror is always: S – the same size A – laterally inverted L – behind the mirror (same distance as object is to the mirror) T - virtual
Activity In your lab group, work on Investigation 11.8 on Pg. 494 And/or Hmwk. Pg. 493 #1-5,7,9,10