Section 17 2 Curved Mirrors Concave Mirrors A

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Section 17. 2 Curved Mirrors Concave Mirrors A concave mirror has a reflective surface

Section 17. 2 Curved Mirrors Concave Mirrors A concave mirror has a reflective surface where the edges of which curve toward the observer. (looks like a cave)

Section 17. 2 Curved Mirrors Convex Mirrors The inner surface of a shiny spoon

Section 17. 2 Curved Mirrors Convex Mirrors The inner surface of a shiny spoon acts as a concave mirror. A convex mirror has edges that curve away from the observer. What do you see when you look at the back of a spoon? You see an upright, but smaller image of yourself.

Section 17. 2 Curved Mirrors

Section 17. 2 Curved Mirrors

Section 17. 2 Curved Mirrors Concave Mirrors The mirror has the same geometric center,

Section 17. 2 Curved Mirrors Concave Mirrors The mirror has the same geometric center, C, and radius of curvature, r, as a sphere of radius, r.

Section 17. 2 Curved Mirrors Concave Mirrors The principal axis is the straight line

Section 17. 2 Curved Mirrors Concave Mirrors The principal axis is the straight line perpendicular to the surface of the mirror that divides the mirror in half.

Section 17. 2 Curved Mirrors Concave Mirrors When you point the principal axis of

Section 17. 2 Curved Mirrors Concave Mirrors When you point the principal axis of a concave mirror toward the Sun, all the rays are reflected through a single point. The focal point is where light rays that are parallel to the principal axis converge after reflecting from the mirror.

Section 17. 2 Curved Mirrors Concave Mirrors F is at the halfway point between

Section 17. 2 Curved Mirrors Concave Mirrors F is at the halfway point between M and C. The focal length, f is the distance between M and F, it is also equal to f = r/2.

Section 17. 2 Curved Mirrors Concave Mirrors The focal length is positive for a

Section 17. 2 Curved Mirrors Concave Mirrors The focal length is positive for a concave mirror.

Section 17. 2 Curved Mirrors Graphical Method of Finding the Image of Concave Mirror

Section 17. 2 Curved Mirrors Graphical Method of Finding the Image of Concave Mirror Ray #1 -Draw A straight line from the top of the object parallel to principle axis reflecting through F. - Project the ray from f through the back of the mirror.

Section 17. 2 Curved Mirrors Graphical Method of Finding the Image of Concave Mirror

Section 17. 2 Curved Mirrors Graphical Method of Finding the Image of Concave Mirror Ray #2 Draw a line from the object through the center of curvature and reflects straight back and projects behind the mirror.

Section 17. 2 Curved Mirrors • Ray #3 • Draw a line from the

Section 17. 2 Curved Mirrors • Ray #3 • Draw a line from the top of the object through F or projecting from F and reflects back parallel to the principle axis. • - Project the reflected ray parallel to the principle axis through the mirror’s surface.

Section 17. 2 Curved Mirrors Graphical Method of Finding the Image 5 -The image

Section 17. 2 Curved Mirrors Graphical Method of Finding the Image 5 -The image forms where the 2 rays intersect.

Section 17. 2 Curved Mirrors Principle Rays for Convex Mirrors Ray #1 -Draw a

Section 17. 2 Curved Mirrors Principle Rays for Convex Mirrors Ray #1 -Draw a straight line from the top of the object parallel to principle axis projecting through F and reflecting from the projected ray.

Section 17. 2 Curved Mirrors Graphical Method of Finding the Image of Convex Mirror

Section 17. 2 Curved Mirrors Graphical Method of Finding the Image of Convex Mirror Ray #2 Draw a line from object at C and reflects straight back through itself.

Section 17. 2 Curved Mirrors Principle Rays for Convex Mirrors Ray #3 -Draw a

Section 17. 2 Curved Mirrors Principle Rays for Convex Mirrors Ray #3 -Draw a ray that goes directly at F and reflects parallel to the principle axis, it will project parallel to the axis behind the mirror.

Section 17. 2 Curved Mirrors Convex Mirrors The reflected ray is drawn along a

Section 17. 2 Curved Mirrors Convex Mirrors The reflected ray is drawn along a sight line from F through the point where ray 1 strikes the mirror.

Section 17. 2 Curved Mirrors • Virtual Images are formed on the opposite sides

Section 17. 2 Curved Mirrors • Virtual Images are formed on the opposite sides of mirrors as the objects. • They are not composed of real light, instead they formed by our interpretation of where light seems to originate from.

Section 17. 2 Curved Mirrors • Images that form on the same side as

Section 17. 2 Curved Mirrors • Images that form on the same side as the object are REAL and can be projected onto a screen. • Images formed above principle axis are UPRIGHT. • Images formed below the principle axis are INVERTED

Section 17. 2 Curved Mirrors • This image is REAL and INVERTED. It is

Section 17. 2 Curved Mirrors • This image is REAL and INVERTED. It is also MAGNIFIED because the IMAGE is larger than the OBJECT.