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"Is magnifier zooms in on the list?" - Optical instruments.

On 21.03.2011r. there were more classes in mathematics and natural sciences.


Magnifier - an optical device used to direct observation of small objects located close. In the strictest sense it is a focusing lens to give at least three times magnification. Lenses which give less than three-fold magnification magnifying glasses are called. Magnifier is made usually with a converging lens or a geographically close group of lenses placed in the holder.

Magnifier does not enlarge the list, but only increases the viewing angle.


optical microscope - a device to a strong magnification, using to generate the image light passing through a special optical system consisting of a set of typically a few to several optical lenses.
optical microscopes are used to observe small objects in many sciences. In biology, are used for example to observe the construction of micro-organisms and tissues. In chemistry and physics are used to indicate eg crystalline transformations. The geology are used to observe the construction of the rocks.

the classes we observed various microorganisms, including skrętnice, cyanobacteria.



accommodation (nastawność eye) - the phenomenon of adaptation of the eye to view objects located at different distances. This adjustment is the proper selection of visual acuity.

Myopia occurs when the fireplace is located in front of the eye retina. Then a distant point lies in a finite distance, and with a strong defect in a very close eye. The reason is too high breaking capacity of the lens or eyeball is too long. The man with the eye condition did not see sharply without a corresponding glasses distant objects, but can correctly see the objects close. Therefore, people exhibiting myopia, to better see objects close to the eye. Hence the name - myope. Correction of myopia is done by means of glasses with lenses scattering.


Myopia - present close to the point is very far and usually it does not even exist and then the eye can not see any sharp objects. Focus of the optical system of the eye is far behind the retina. So call this defect "farsightedness" is very misleading because a person can not see well either close or distant objects. Therefore, the Polish ophthalmologists do not call this defect "foresight" but hyperopic. It is then always focusing glasses. The cause of this condition may be congenital too short antero-posterior axis (mainly in children) or too weak, the ability of focusing the lens through reducing its flexibility. This defect is corrected by focusing lenses.

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"Our focus and diffuses the light" - to receive images using lenses.

On 17.03.2011r. held the first classes in natural sciences - mathematics in the second semester.

lens - a simple optical device consisting of one or several glued together blocks of transparent material (usually glass, but also a variety of plastics, gels, minerals, and even paraffin).

diffusing lens:


focusing lens:


Experience 1
Topic: Run of light rays in the lens.

Observations:
In the first case, the rays are focused in the second scatter.

Conclusions:
lens biconvex lens is focusing and the second - concave - lens dissipating.

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"Can you believe my eyes?" - An optical illusion.

3.02.2011r Day. in class we talked about optical illusions. We learned how a mirage phenomenon and what role it plays in temperature.

Experiment 1
Subject: Invisible bottle.

Observations:
Immersed part of the bottle is invisible. This is because the refractive indices of glass and glycerol are very similar.

Conclusions:
speed with which light moves in certain types of glass is the same as in the glycerol. Experiment 2


Subject: oil light smuggler.

Observations:
Lighting the spot light from the wall is much more intense than when it passes through dry paper.

Conclusions:
dry piece retaining part of the light rays. Oil, however, entering the paper fibers creates small translucent light permeable cracks. Experiment 3


Subject: trust your own eyes?

optical illusion image-wrong information by the brain under the influence of contrast, shadows, color use, which automatically put the brain in a wrong way of thinking. The illusion results from the mechanisms of perception, which usually helps in the perception. Under certain conditions, however, may cause apparently the only real impression.

(During the course we are acquainted with the "café wall illusion," and the "illusion Ponza, "Hermann grid," "impossible figures", "invisible, an object" and the "spinning wheel".)

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"Colored sorcery" - mixing additive colors.

On 20.01.2011r. There were classes where we learned from what color it is light consists of a continuous white light and that the color of light is related to the length of the waves.

Experiment 1
Topic: Color Mixer.

Observations:
Conclusions:

Experiment 2
Subject: Colored circle.

Observations:
Conclusions:

Experience 3:
Topic: Newton's circle.

Observations:
Conclusions:

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"after crossing light - light refraction on the boundary of two media.

On 13.01.2011r. took place the next class of mathematical sciences - natural sciences.


Topic Experiment 1: Effect of flying coins.

Observations: Observed
coin after adding water to the bottom of the vessel appears to be larger and located closer to the surface.
Conclusions: This phenomenon occurs
because rays reflected from the coin is bent during passage through the border of water and air. Experiment 2


Topic: Off tsp.

Observations:
spoon seemed to be the most articulated in the water, which was dissolved in 3 teaspoons of salt.
Conclusions: Light runs from the spoon, and before getting into the eye of the observer collapses the border between two media: water and air. It runs from the denser medium to rarer medium. Experiment 3

Subject:

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"Even light can not always moves in straight paths" - the right of the straight propagation of light.

On 21.12.2010r. classes were held in which we are acquainted with concepts such as law of reflection, refraction law, the law of rectilinear propagation of light, the right of total internal reflection. We have the following

Experience: Experience an


Subject: Light travels in straight lines.

Observations:
flashlight passed through two holes.
Conclusions:
light propagates along straight lines. Experiment 2


Subject: Shadows and midtones.

Observations:
wtyniku illuminate the globe on the screen appeared in its shadow, and after both of his reposed appeared midtones.
After setting the path between a flashlight, a disc of tissue paper globe, appeared on the globe shade.
Conclusions: This model is
phenomenon eclipse. Experiment 3


Subject: line of Light.

Observations:
stream water was luminous.
Conclusions: There was
phenomenon of total internal reflection of light.

Experiment 4
Topic: The phenomenon of total internal reflection in a prism.

Conclusions:
Depending on the setting rays of the prism direction is changing. We observe the phenomenon of total internal reflection of light.

Experiment 5
Subject: Reflections on the water surface.

Observations: light
collapsed on the border of two media.
Conclusions:
is a phenomenon of total internal reflection of light.