Loading presentation...

Present Remotely

Send the link below via email or IM


Present to your audience

Start remote presentation

  • Invited audience members will follow you as you navigate and present
  • People invited to a presentation do not need a Prezi account
  • This link expires 10 minutes after you close the presentation
  • A maximum of 30 users can follow your presentation
  • Learn more about this feature in our knowledge base article

Do you really want to delete this prezi?

Neither you, nor the coeditors you shared it with will be able to recover it again.



Part 1: How We See Part 2: Technology

Matt Boboltz

on 19 April 2010

Comments (0)

Please log in to add your comment.

Report abuse

Transcript of Light

Andy Tran and
Matt Boboltz Part 1: How We See Light The Eye Lens- Located behind the cornea, focuses light rays onto the retina. Sclera- Coats the eye ball, forming the white of the eye, and covers the optic nerve in the back of the eye
Iris- The colored part of the eye that surrounds the pupil, it works to narrow or widen the pupil, which controls the amount of light let into the eye
Retina- Is a sensory membrane covering the inside of the eye, it converts images formed by the eye to signals that are sent to the brain through the optic nerve Pupil- The pupil is a hole in the center of the eye, which regulates the amount of light that passes through to reach the retina. Virteous Humor- A clear gel between the lens and the retina, images pass through the virteous humor to reach the retina
Cornea- Covering the iris and the pupil, the cornea is clear, and allows light to enter the eye Optic Nerve- At the back of the eye, transfers electrical impulses formed at the rods and cones to the brain Colors
Objects RED ROYGBiV Light visible to humans is often referred to as "white light" because it appears this way in our eyes, but really, visible light a spectrum of red, orange, yellow, green, blue, indigo, and violet. When light is provided and reflected, some objects will absorb some of the colors of light, and the rest will reflect. This is how we can see light. For example, if you look at an apple in the sun, you see that it is red. This is because when the sun provides it with light, and part of the spectrum of visible light is absorbed in it, EXCEPT for red, which is reflected to our eyes. Because light will reflect off of the surfaces of objects, we can see. If light is provided, i.e. a lamp or flashlight, the light rays will bounce off many surfaces, and eventually reach the eye. Optical Illusions Our eyes are not perfect. In fact, they can be tricked using images called optical illusions. Our brains are taught to process images automatically, and in patterns. Because of this, our brains are hardwired to believe certain things a certain way. Optical illusions show our brains images things that do not agree with what the brain has been taught, and because of this, the brain struggles to break the pattern and figure out how to decifer the illusion. 3-D Movies In the 50's, the method of 3-D viewing was glasses with two different gels, red, and blue. By making the glass lens in color, the glasses filtered what color light could reach the eye, and because of the difference of colors, the eyes would receive different images. The 3-D movie would display the movie in two colors on the same screen, a red movie and a blue movie. The views would be separated and the brain would be tricked into thinking the image was coming out of the screen. Blue and Red Glasses Polarized Glasses Today, 3-D movies are made with polarized glasses. This is similar to the red and blue glasses, but instead, the lens have different polarization. The screen provides two views of the movie in different polarization, and the lenses separates the view. This is better, because the polarization doesn't affect color, so you can view the movie in color. Part 11: Technology TV Signals Analog Digital Analog signal used the process of taking an audio or video signal and translating it into electronic pulses, but analog signal can only hold a limited amount of data. Digital signal uses binary code, a series of 1's and 0's, to transmit complicated combinations of data to the reciever, such as a television, which translates the code back into the original signal. Digital signal can hold much more data than analog, can correct mistakes made during the transfer of data, and has much clearer picture quality on television. Over-the-Air HD Over-the-air high definition television works by sending digital signal over the air and using an antenna to capture the signal or with a digital tuner in your television. WiFi What is it? WiFi is a much more convenient way to access the Internet because it allows people to get online from many different places wirelessly. It is a two-way wireless communication network using radio waves to allow access to the Internet. How it Works The way it works is that a computer’s wireless adapter transmits radio signals to a router— which is connected to the Internet with a physical, wired Ethernet connection— using an antenna, and can also work both ways sending information from computer to router, or router to computer, transmitting at frequencies of about 2.4 GHz to 5 GHz. THE END
Full transcript