New Blog 4 a New Quarter

The first periodic test is over! That means:
New quarter, project, lessons, assignments, quizzes, tests and a new blog...
What will happen to this quarter?...

The Law of Reflection

The incident, normal, and reflected ray are all in the same plane.
The theta-r (angle of reflection) = theta-i (angle of incidence).

Eye and the Camera

Lens

• bends light rays so that they form a clear image at the back of the eye – on the retina. As the lens is elastic, it can change shape, getting fatter to focus close objects and thinner for distant objects.

Pupil / Aperture

• the entrance of light.

Iris / Diaphragm

• changes the size of the pupil / aperture and allows different amounts of light to enter the eye / camera.

Retina / Film

• produces an image which is sent along the optic nerve for the brain to interpret, rather like developing a camera film.

Choroid / Dark internal Surface

• absorbs excessive light to prevent multiple images formation.

Difference

• their focusing mechanism

-camera changes the distance between the lens and the film.

-the human eye changes the focal length of lens using the ciliary muscles.

Mirror

Two kinds:

1. concave

the image is erect

may produce a real or virtual image

has a positive magnification

object was facing the front of the mirror

2. convex

the image is inverted

always produce virtual image

has a negative magnification

object is place behind the mirror

Loving Physics Day!

What a lucky day in Physics III! I knew that I my parents will not come in the "parents' day" this Friday. In addition, I also knew my score in the Summative Test last Thursday and Friday. Its not a bad score. I really loved this day.

Family Day?!

After two days of testing and two days of refreshment and "reincarnation", we will now know if our parents will come to Masci and meet Mr. Mendoza. Tommorow will be a thrilling day in PhysicsIII. I wonder if I got a high score in the long test.

The Day B4 The Resurection

We had a wonderful day today. We learned about finding the velocity of the train in Mr. MosKiMen's "problem of the day". No tests, no lessons, just solving an exercise. Hope that I will get high in the upcoming test.