MEMORIES OF MY POSTS
Friday, August 3, 2007
Eye and Camera Comparison


Camera=Eyes
Film=Retina
Diaphragm=Iris
Aperture=Pupil
Lens=Lens
Black Paint=Choroid
Similarities
>Opening for light to enter
+aperture
-pupil
>Control the amount of light entering camera/eye
+diaphragm control size of aperture
-iris muscles control size of pupil
>Refract light
+glass biconvex lens
-mainly cornea ; lens, aqueous & vitreous humor
>Object of light action to form image
+photosensitive chemicals on film
-photoreceptors(rods & cones) in retina
>Absorb excessive light to prevent multiple images formation
+dark internal surface
-pigmented, dark choroid
Difference
>Focusing mechanism
+change distance between lens & film
-change focal length of lens using ciliary muscles
Legend:
+ = camera
- = eyes
Ray Diagram for Convex mirror

Location: Opposite side of the mirror
Size: Reduced
Position: Upright
Image: Virtual
``larah3ptolemy0708 ; 8:02 PM
....................................
ABOUT MY FAVE SUBJECT - PHYSICS .... duh...
Physics is an idea.
The idea is a simple one.
There's a whole lot of space out there. A whole lot!
And it ain't all what it seems.
"Who am I?" As if I dont know...
"Why am I here?" Bah.
Those questions mean nothing. If I could unfurl my mind enough to look fully into the face of space/time, I WOULD understand.
I would be enlightened... while solving these problems==>
LARAH'S PHYSICS ALPHABET
The Physics Alphabet
A is for Ampere, which makes quite good sense;
B is for Mag Field, and now I get tense.
C is for Speed, of light, oh so hectic;
D is for Moment, of dipoles electric.
e is a Base, our natural friend;
F is Momentum.
G is for Function, when "f" just won't fly;
h is Planck's Constant, which we often times by.
I is for Current, the charges all run;
J is for Bessel, his Function, such fun!
K is Potassium (some ChemPhys content);
L is Momentum, in an angular bent.
M is for Spin, when its subscript is "s";
N is for Number - which works, I confess!
O is the Empty Set (okay, so that's math);
P is Momentum, on a linear path.
Q is for Heat, to warm the cold night;
R is the Gas Constant, which I never get right.
S is for Entropy, its value we need;
T is for Energy, of the kinetic breed.
U is more Energy, potential this time;
V's also potential... NEED HELP! I can't think of a rhyme!
W is for Tungsten (one last ChemPhys fling);
X is for, well, just about Physics anything!
Y is for Functions of Bessel's second kind;
Z is for Charge, bringing up the behind.
So next time the artsies are on your back,
Critiquing your spelling in a vicious attack,
Say to them simply, looking straight in their eyes,
"I'm using my PERSONAL PHYSICS ALPHABET - what's wrong with you guys?!?"
It ain't your typical alphabet system or make not sense.
But it's MINE and for my own consumption.