Lesson Summary.
2. Eye can see an object if the shadow formed ......
a. True, erect diretina
b. True, trbalik diretina
c. Maya, inverted diretina
d. Maya upright diretina
4. People with nearsightedness can be helped by eye glass lens.....
a. Concave c. Convex
b. Concave and convex d. bifokal
6. To establish a good image in the camera needed a tool that cancollect light. Where is the right tool for this purpose?
a. concave mirror
b. concave lens
c. convex mirror
d. convex lens
8. To see an object with a magnifying glass, the object is placed between the F and O in order to obtain the shadow ....
10. Image formed by a microscope objective lens is ....
a. Real, upright, magnified
b. Real, inverted, dierbesar
c. Maya, upright, magnified
d. Maya, inverted, magnified
For Grade 8.
Have you ever seen an optical shop?
Optical shop is a shop that sells optical instruments such asspectacles plus, minus glasses and contact lenses.
In addition to other optical glasses is the camera equipment,miskroskop, binoculars, periscope and others.
Eye.
The eyes are the most important optical devices.
Part of our eyes that serves as an optical instrument is the lens of the eye.
The sections related eye shadow formation process were: iris,pupil, lens and retina.
Optical shop is a shop that sells optical instruments such asspectacles plus, minus glasses and contact lenses.
In addition to other optical glasses is the camera equipment,miskroskop, binoculars, periscope and others.
Eye.
The eyes are the most important optical devices.
Part of our eyes that serves as an optical instrument is the lens of the eye.
The sections related eye shadow formation process were: iris,pupil, lens and retina.
Parts of the eye:
You can see objects at near and far distances in successionautomatically.
If the eye is still normal, then the shadow objects that you seealways fallen or formed on the retina.
Because of the lens to thicken and thin out automatically.
The ability to thicken and memipihkan eye lens to fit the observedobject distance is called the power of accommodation.
If the eye is still normal, then the shadow objects that you seealways fallen or formed on the retina.
Because of the lens to thicken and thin out automatically.
The ability to thicken and memipihkan eye lens to fit the observedobject distance is called the power of accommodation.
The maximum accommodation occurs when you see the closestthing. When the lens of the eye mencembung maximum.
While the minimum accommodation occurs when you see thingsvery far away that the eye lens-thin-thin flattened.
While the minimum accommodation occurs when you see thingsvery far away that the eye lens-thin-thin flattened.
Because that's the technical term is the point of near and far pointsof the eye.
Point near the eye (PP-punctum proximum) is the closest distance of objects so that objects can still be seen clearly in a state ofmaximum berakomodasi eye.
To the normal eye, PP = 25 cm.
Eye far point (punctum remotum-PR) is the closest distance ofobjects so that objects are seen clearly in a state of maximumberakomodasi not eye.
To the normal eye PR = infinity.
Point near the eye (PP-punctum proximum) is the closest distance of objects so that objects can still be seen clearly in a state ofmaximum berakomodasi eye.
To the normal eye, PP = 25 cm.
Eye far point (punctum remotum-PR) is the closest distance ofobjects so that objects are seen clearly in a state of maximumberakomodasi not eye.
To the normal eye PR = infinity.
Eye defects.
Based on the cause, there are three kinds of eye defects, namelymiopi, hipermetropi, and presbiopi.
1. Miopi.
Patients miopi can clearly see close objects, but can not clearly see objects that are located at a distance.
Miopi are eye defects caused by the tendency of the lens tothicken so that point is much closer eye.
As a result, the image formed in front of the retina.
Point near the patient miopi is 25 cm (normal), but less than a pointaway to infinity.
1. Miopi.
Patients miopi can clearly see close objects, but can not clearly see objects that are located at a distance.
Miopi are eye defects caused by the tendency of the lens tothicken so that point is much closer eye.
As a result, the image formed in front of the retina.
Point near the patient miopi is 25 cm (normal), but less than a pointaway to infinity.
2. Hipermetropi.
Someone who suffers hipermetropi can clearly see objects that areinfinitely far away, but can not clearly see objects at a distance ofabout 25 cm.
Hipermetropi is caused eye defects tend to be flattened so that the eye lens near the eye the more distant point.
As a result, a shadow is formed behind the retina.
Distant point hipermetropi patient is normal (PR: infinity), nearbypoints more than 25 cm.
Someone who suffers hipermetropi can clearly see objects that areinfinitely far away, but can not clearly see objects at a distance ofabout 25 cm.
Hipermetropi is caused eye defects tend to be flattened so that the eye lens near the eye the more distant point.
As a result, a shadow is formed behind the retina.
Distant point hipermetropi patient is normal (PR: infinity), nearbypoints more than 25 cm.
3. Presbiopi
Muscle eye on elderly people who have been unable to workflexibly as when he was young.
The weakening of eye muscles causes decreased power eye accommodation.
Someone who has weak eyes accommodation power is said tosuffer presbiopi.
Near point and far point presbiopi patients shifted from normal.
Lesson optical instruments other than read their own books in eachschool.
Muscle eye on elderly people who have been unable to workflexibly as when he was young.
The weakening of eye muscles causes decreased power eye accommodation.
Someone who has weak eyes accommodation power is said tosuffer presbiopi.
Near point and far point presbiopi patients shifted from normal.
Lesson optical instruments other than read their own books in eachschool.
Exercise Problems.
Choose the best answer!
1. Lenses in optical devices whose function is to form a shadownamed .....
a. Positive lens c. Negative lens
b. D. objective lens Ocular lens
Choose the best answer!
1. Lenses in optical devices whose function is to form a shadownamed .....
a. Positive lens c. Negative lens
b. D. objective lens Ocular lens
2. Eye can see an object if the shadow formed ......
a. True, erect diretina
b. True, trbalik diretina
c. Maya, inverted diretina
d. Maya upright diretina
3. Eyes of someone who used to see objects closely, it produces a shadow behind the retina. State of the eye including the ......
a. Normal eye
b. Eye miopi
c. Eye hipermetropi
d. Eye presbiopi
a. Normal eye
b. Eye miopi
c. Eye hipermetropi
d. Eye presbiopi
4. People with nearsightedness can be helped by eye glass lens.....
a. Concave c. Convex
b. Concave and convex d. bifokal
5. Image formed on the film camera is .....
a. Real, inverted, reduced
b. Real, upright, reduced
c. Maya, upright, reduced
d. Maya, inverted, reduced
a. Real, inverted, reduced
b. Real, upright, reduced
c. Maya, upright, reduced
d. Maya, inverted, reduced
6. To establish a good image in the camera needed a tool that cancollect light. Where is the right tool for this purpose?
a. concave mirror
b. concave lens
c. convex mirror
d. convex lens
7. Things are viewed using a magnifying glass with your eyesberakomodasi not be ....
a. In between O and F
b. Right in the F
c. Between F and 2F
d. At a distance of more than 2F
a. In between O and F
b. Right in the F
c. Between F and 2F
d. At a distance of more than 2F
8. To see an object with a magnifying glass, the object is placed between the F and O in order to obtain the shadow ....
a. True zoomed
b. True to be minimized
c. Pseudo-zoomed
d. Quasi-reduced
b. True to be minimized
c. Pseudo-zoomed
d. Quasi-reduced
9. The image of the end of the resulting microscope is ....
a. Maya, inverted, and larger
b. Maya, inverted, and smaller
c. Real, inverted, and larger
d. Real, inverted, and smaller
a. Maya, inverted, and larger
b. Maya, inverted, and smaller
c. Real, inverted, and larger
d. Real, inverted, and smaller
10. Image formed by a microscope objective lens is ....
a. Real, upright, magnified
b. Real, inverted, dierbesar
c. Maya, upright, magnified
d. Maya, inverted, magnified
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