Ray Diagram: Convex, Concave and Mirror

CONVEX

Ray 1 is parallel to the axis until it reaches the lens then refracts, passing through the focal point on the right.



Ray 2 passes through the center without bending

Ray 3 passes through focal point on the left until it reaches the lens then refracts, parallel to the axis.

CONCAVE

Ray 1 is parallel to the axis then refracts through the lens so that, when dotted back, it passes through the focal point.







Ray 2 passes through center without bending.

Ray 3 aims for the secondary focus, refracts through the lens and runs off parallel to the axis on the other side of the lens.

MIRROR

cite:http://dev.physicslab.org/Document.aspx?doctype=3&filename=GeometricOptics_ConvergingLenses.xml, http://dev.physicslab.org/Document.aspx?doctype=3&filename=GeometricOptics_DivergingLenses.xml, http://dev.physicslab.org/Document.aspx?doctype=2&filename=GeometricOptics_ManMirrorSolution.xml

Fiber Optics

Fiber optics is a technology using glass threads or plastic fibers to transmit data popular in local-area networks. Each glass thread can transmit messages modulated on light waves.

cite:http://www.webopedia.com/TERM/F/fiber_optics.html

Similarities Between the Eye and the Camera

First of all, both of them have an opening at the center for light to enter; aperture for the camera and a pupil for the eye. The camera has a diaphragm to control the size of the aperture(to control the amount of light entering camera/eye) while the eye has iris muscles to control the size of the pupil. Cornea is the main part of the eye(included are lens, aqeuos and vitreous humor) that functions to refract light as a glass biconvex does in the camera. Photosensitive chemicals on film(camera) and photoreceptors in the cornea(eye) are the objects of light action to form image. The last similarity is that they both absorb excessive light to prevent multiple images formation using a dark internal surface in the camera and a pigmented, dark choroid in the eye.

cite:http://library.thinkquest.org/28030/eyeevo.htm

The Physics Epic 6 "Perfect"

Okay, so I wasn't able to do what I promised to do. What can I say? There's not much going on inside the hell hole of a class. Not much except for our intelligence being sucked up.

Well, maybe something did happen. And it's something I'd really want to rub in people's faces in my imagination. But, I'm too much of a good girl to do that. Believe me. :D

...

I GOT A PERFECT SCORE!!!!! HAHAHAHAHA!!! IN YOUR FACES!!!!

PERFECT!!!! PEEEERRRRRFFFFFFFFFFFEEEEEEEEEEEEECT!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
(boy, that felt good)

By the way, Vernisse is the PIO for the PION club. She wouldn't even go in the first place if I didn't say I'd go. I just feel like calling myself as the "initiator of her destiny". XP

Physics Epic 5: The "0" Will Live Forever

I just noticed that I haven't posted anything at all last week so I decided to double(4 posts for me) my posting this week when I realized there's nothing much to talk about.

Within the past week, we've been graced with light, flowed through the waves and hit hard by the avalanche of quizzes that came crashing towards that still developing village by the foot. Is it still possible for any of us villagers to raise the flag of 90 up on the summit? There may be no hope left in Pandora's box now. Hope flew out of the window to disease and calamities and everything except for the elusive Physics.

Shall I dare say most of us had a "0" on our quiz again? Well, yes... sad as I am, I at least had a pretty fair score the last time not to mention it was passing. Passing... OH MY GOD I PASSED A PHYSICS QUIZ!!!

Our special project for the first grading period: "Life of a Mirror", a music video. Now that's something different. I've thought about it a bit already but I'm still a bit unsure with putting it all together. I just wish my group mates wouldn't act like parasites, dependent and all 'cause I'd just pluck them out and squish them.

Physics Epic 4: The "0" Syndrome Again

What can we do? What can't we do? Do those quizzes right. We do (kinda) understand the lesson but we can't put them to writing. *sigh* Another pierce through the heart of Mr. Mendoza. We can't seem to move on either. Oh, the pain we are all going through...

As you could have possibly guessed from the title, yes, it is another title of Physics Wars: Attack of the "0's". Another box office hit brought to you by the students of III-Mendel, sucks more than the first but more understandable now. And that's better than the gross income we earned.

Anyway, I'm done with my homework now and it's right below this entry. You won't miss it.

Vectors

>Graphical Method

1. With itstail at the origin, draw the 1st vector and properly label it.
2. Then, draw the tail of the 2nd vector at the head of the 1st vector.
3. The resultant vector is an arrow drawn from the tail of the 1st vector to the head of the 2nd vector.
4. Using a ruler, measure the length of the resultant vector. Then convert this length back to the original using the scale. This is the magnitude. Using a protractor, measure angle theta. This is the direction.


>Component Method

1. First, break down each vector into its x- and y- components.
2. Add all the x-components together. Add all the y-components together. The total x-component will be the x-component of the resultant Rx and the total y-component will be the y-component of the resultant Ry.

(Ref: e-Physics The Next Generation)