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Images in Plane Mirrors. Remember this? Fallsview Casino Lucky Seven TV ad.

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Presentation on theme: "Images in Plane Mirrors. Remember this? Fallsview Casino Lucky Seven TV ad."— Presentation transcript:

1 Images in Plane Mirrors

2 Remember this? Fallsview Casino Lucky Seven TV ad

3 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

4 Virtual Image source apparent source mirror

5 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…

6 Locating an Image object image Object- image line normals

7 Try one yourself! Pick an object point Pick a view point Now draw in the light rays and find the image!

8 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

9 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?

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11 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)

12 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

13 Activity In your lab group, work on Investigation 11.8 on Pg. 494 And/or Hmwk. Pg. 493 #1-5,7,9,10


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