Science
B6D1E1
Technology in Overcoming the Limitation of Sight
Name: Chia Wenli
Class: 2O
Teacher: Cik Norhayati bt Md Nor
Date: 3 Mei 2013
Content 1. | Objective | Pg 1 | 2. | Labeled picture | Pg 2 | 3. | The principle of sight | Pg 3 | 4. | Conclusion | Pg 4 | 5. | Reference | Pg 5 |
Objective
The aperture of a telescope is several times larger than the aperture of human eye so that the objects that cannot be normally seen by unaided eye can be seen. Light- gathering power of a telescope is proportional to the area of its aperture and hence depends on the square of the radius of the mirror. Therefore a 20 cm diameter telescope collects four times more photons than a 10 cm diameter telescope.
Pg1
Labelled Picture
Pg2
The Principle of Sight
Optical telescopes are divided into two basic categories: refracting telescopes and reflecting telescopes.
Refracting Telescopes Refracting telescopes utilize a system of lenses that collect and refract light to magnify the image (Figure ). They have a larger diameter lens called the objective lens and a small lens called an eyepiece. Good refracting telescopes utilize multiple lens systems to correct for color aberrations. Chapter discusses lenses in the section on “Stations for Sight”.
Reflecting Telescopes Reflecting telescopes utilize one or more concave mirrors for the objective lens to condense the light and a small lens called an eyepiece.
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Conclusion
A telescope is an instrument that aids in the observation of remote objects by collecting electromagnetic radiation (such as visible light). The first known practical telescopes were invented in the Netherlands at the beginning of the 17th century, using glass lenses. They found use in terrestrial applications and astronomy.
Within a few decades, the reflecting telescope was invented, which used mirrors. In the 20th century many new types of telescopes were invented, including radio telescopes in the 1930s and
Technology in Overcoming the Limitation of Sight
Name: Chia Wenli
Class: 2O
Teacher: Cik Norhayati bt Md Nor
Date: 3 Mei 2013
Content 1. | Objective | Pg 1 | 2. | Labeled picture | Pg 2 | 3. | The principle of sight | Pg 3 | 4. | Conclusion | Pg 4 | 5. | Reference | Pg 5 |
Objective
The aperture of a telescope is several times larger than the aperture of human eye so that the objects that cannot be normally seen by unaided eye can be seen. Light- gathering power of a telescope is proportional to the area of its aperture and hence depends on the square of the radius of the mirror. Therefore a 20 cm diameter telescope collects four times more photons than a 10 cm diameter telescope.
Pg1
Labelled Picture
Pg2
The Principle of Sight
Optical telescopes are divided into two basic categories: refracting telescopes and reflecting telescopes.
Refracting Telescopes Refracting telescopes utilize a system of lenses that collect and refract light to magnify the image (Figure ). They have a larger diameter lens called the objective lens and a small lens called an eyepiece. Good refracting telescopes utilize multiple lens systems to correct for color aberrations. Chapter discusses lenses in the section on “Stations for Sight”.
Reflecting Telescopes Reflecting telescopes utilize one or more concave mirrors for the objective lens to condense the light and a small lens called an eyepiece.
Pg3
Conclusion
A telescope is an instrument that aids in the observation of remote objects by collecting electromagnetic radiation (such as visible light). The first known practical telescopes were invented in the Netherlands at the beginning of the 17th century, using glass lenses. They found use in terrestrial applications and astronomy.
Within a few decades, the reflecting telescope was invented, which used mirrors. In the 20th century many new types of telescopes were invented, including radio telescopes in the 1930s and