Light is a particle and a wave and goes out in a straight line unless it bumps something. Copyright © 2010 Ryan P. Murphy.

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Presentation transcript:

Light is a particle and a wave and goes out in a straight line unless it bumps something. Copyright © 2010 Ryan P. Murphy

Light can be bent by gravity.

Refraction: The bending of a wave when it enters a medium where it's speed is different. Copyright © 2010 Ryan P. Murphy

An eagle must compensate for refraction when catching a fish. Copyright © 2010 Ryan P. Murphy

Diffraction: Bending of waves. Copyright © 2010 Ryan P. Murphy

Video! (Optional) Wave hitting a straight barrier in a ripple tank experiment in Japan.

Lens: A transparent optical device used to converge or diverge transmitted light and to form images. Copyright © 2010 Ryan P. Murphy

Copyright © 2010 Ryan P. Murphy

Convex Copyright © 2010 Ryan P. Murphy

Convex Concave Copyright © 2010 Ryan P. Murphy

Convex Concave Copyright © 2010 Ryan P. Murphy

Convex “Get out of my cave.” Concave Copyright © 2010 Ryan P. Murphy

Concavo-convex

Concavo-convex

Which a concave polygon?

Which a concave polygon?

Which a concave polygon?

Adjusting the lens, adjusts the focus and will allow to see more clearly.

Activity! Place the four dots on the focal point of each picture below.

Activity! Place the four dots on the focal point of each picture below.

Activity! Place the four dots on the focal point of each picture below.

Activity! Place the four dots on the focal point of each picture below.

Activity! Place the four dots on the focal point of each picture below.

Activity! Place the four dots on the focal point of each picture below.

Reminder to teacher! Reset focal points for next group.

Which is convex and which concave? Copyright © 2010 Ryan P. Murphy

Which is convex and which concave? Copyright © 2010 Ryan P. Murphy

Which is convex and which concave? Copyright © 2010 Ryan P. Murphy

These are both double convex, and double concave? Copyright © 2010 Ryan P. Murphy

These are both double convex, and double concave? Copyright © 2010 Ryan P. Murphy

Concave Mirror Copyright © 2010 Ryan P. Murphy

Convex mirror Copyright © 2010 Ryan P. Murphy

Which mirror is convex, and which mirror is concave?

Which mirror is convex, and which mirror is concave?

Which mirror is convex, and which mirror is concave?

Which mirror is convex, and which mirror is concave?

Which mirror is convex, and which mirror is concave?

Which mirror is convex, and which mirror is concave?

Which mirror is convex, and which mirror is concave?

For those who wear eyeglasses, the glasses help correct the focus point. Copyright © 2010 Ryan P. Murphy

Nearsighted Copyright © 2010 Ryan P. Murphy

Farsighted Copyright © 2010 Ryan P. Murphy

Which is nearsightedness, and which is far sightedness?

Farsightedness

Farsightedness Nearsightedness

Farsightedness Nearsightedness

Is this person nearsighted or far sighted? Copyright © 2010 Ryan P. Murphy

Answer! Farsighted Copyright © 2010 Ryan P. Murphy

Answer! Farsighted Copyright © 2010 Ryan P. Murphy

Activity! Vision test. Second to bottom row from the back of the room. Copyright © 2010 Ryan P. Murphy

Hubble Space Telescope.

Copyright © 2010 Ryan P. Murphy

Polarized Lenses: Copyright © 2010 Ryan P. Murphy

Polarized Lenses: Think of them as window blinds with slats. Copyright © 2010 Ryan P. Murphy

Polarized Lenses: Think of them as window blinds with slats Polarized Lenses: Think of them as window blinds with slats. Light travels in waves. As the waves come to the slats, any waves that are not lined up with the openings in the slats are blocked out. Copyright © 2010 Ryan P. Murphy