RAY DIAGRAMS FOR MIRRORS CONCAVE MIRRORS All ray
- Slides: 10
RAY DIAGRAMS FOR MIRRORS
CONCAVE MIRRORS All ray diagrams start with a center line and the mirror
Next, put in the focal point (F) and the center of curvature (C) Note: F is always closer to the mirror; C is twice as far as F Next, put in the object as described in the problem. C F
You can get 3 types of images from a concave mirror. The type of image is determined by the object distance. do > R (note: R = distance from mirror to C) C F IMAGE = real, inverted, smaller R > do > f C F (note: f = focal length) IMAGE = real, inverted, bigger do < f C F IMAGE = virtual, upright, bigger
RAY DIAGRAM: do > R - draw a ray parallel to the center line to the mirror THEN through F - draw a ray through F to the mirror THEN parallel to the center line - draw a ray through C to the mirror then back through C C F The point where the reflected rays intersect is where the image will be formed
RAY DIAGRAM: R > do > f - draw a ray parallel to the center line to the mirror THEN through F - draw a ray through F to the mirror THEN parallel to the center line - draw a ray in line with C to the mirror then back through C C F
RAY DIAGRAM: do < f - draw a ray parallel to the center line to the mirror THEN through F - draw a ray in line with F to the mirror THEN parallel to the center line - draw a ray in line with C to the mirror then back through C C F Reflected rays do not meet in “real” space. Draw dotted lines back from reflected rays so that they intersect behind the mirror.
CONVEX MIRRORS All ray diagrams start with a center line and the mirror
Next, put in the focal point (F) and the center of curvature (C) Note: F & C are “behind” the mirror Next, put in the object as described in the problem. F C
You can only get 1 type of image from a convex mirror: virtual, upright, smaller - draw a ray parallel to the center line to the mirror THEN in line with F - draw a ray through F to the mirror THEN parallel to the center line - draw a ray to C to the mirror then back from C F C Reflected rays do not meet in “real” space. Draw dotted lines back from reflected rays so that they intersect behind the mirror.
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