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What is the focal length of a telescope's mirror if I use an eyepiece with a focal length of 26 mm and I get a magnification of 70x?
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∙ 14y ago
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∙ 14y ago
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Telescope magnification power with a 30 mm eyepiece for a telescope?
To calculate the magnification power with a 30 mm eyepiece, you need to divide the focal length of the telescope by the focal length of the eyepiece. For example, if the telescope has a focal length of 600 mm and you use a 30 mm eyepiece, the magnification would be 20x (600 mm / 30 mm = 20x).
Show How to calculate the magnification of a telescope with a 1000mm focal length an8-inch primary mirror a 4-foot body tube and a 25 mm eyepiece?
To calculate the magnification of a telescope, you would divide the focal length of the telescope by the focal length of the eyepiece. In this case, focal length of telescope = 1000mm and focal length of eyepiece = 25mm. So, magnification = 1000mm / 25mm = 40x.
How can the magnifying power of a telescope be increased?
The magnifying power of a telescope can be increased by using a lens or mirror with a shorter focal length, which will result in a larger magnification. Additionally, increasing the aperture size of the telescope will allow more light to enter, resulting in a brighter image with better detail. Finally, using a higher quality eyepiece can also improve the overall magnification of the telescope.
The magnification of a telescope is changed by changing the what?
The magnification of a telescope is changed by changing the focal length of the eyepiece or the objective lens. By adjusting the distance between these optical elements, the magnification of the telescope can be altered.
Does the diameter of a telescope control its magnification?
No, the diameter of a telescope's objective lens or mirror determines its light-gathering ability and resolving power, while the magnification is determined by the ratio of the focal length of the objective lens or mirror to the eyepiece.
What is the power of the eyepiece?
The magnification, or power, at which a telescope is operating is a function of the focal length of the telescope's main (objective) lens (or primary mirror) and the focal length of the eyepiece employed.
How can the magnifying power of a telescope be increased?
The magnifying power of a telescope can be increased by using a lens or mirror with a shorter focal length, which will result in a larger magnification. Additionally, increasing the aperture size of the telescope will allow more light to enter, resulting in a brighter image with better detail. Finally, using a higher quality eyepiece can also improve the overall magnification of the telescope.
Telescope magnification power with a 30 mm eyepiece for a telescope?
To calculate the magnification power with a 30 mm eyepiece, you need to divide the focal length of the telescope by the focal length of the eyepiece. For example, if the telescope has a focal length of 600 mm and you use a 30 mm eyepiece, the magnification would be 20x (600 mm / 30 mm = 20x).
Show How to calculate the magnification of a telescope with a 1000mm focal length an8-inch primary mirror a 4-foot body tube and a 25 mm eyepiece?
To calculate the magnification of a telescope, you would divide the focal length of the telescope by the focal length of the eyepiece. In this case, focal length of telescope = 1000mm and focal length of eyepiece = 25mm. So, magnification = 1000mm / 25mm = 40x.
What are some reasons for using mirrors in telescopes?
In telescopes that use them, mirrors are the principal mechanism of magnification. The mirror is what gathers the light, and the more light gathered the better. The eyepiece is not the principal magnifier; the eyepiece serves to focus the gathered light so that it can make a clear image on the retina. The larger the mirror, the more light is gathered, and the better the telescope is.
The magnification of a telescope is changed by changing the?
The magnification of a telescope is the ratio of the effective focal length of the objective to the focal length of the eyepiece. For example, a small telescope's objective may have a focal length of 800mm. When an eyepiece with a focal length of 25mm is used, the magnification is 800/25 = 32. The term "effective focal length" refers to the focal length of the objective as affected by any "focal extender". Many telescopes are designed to have a short total size, but high power, by "folding" the optical path. A mirror-type objective with a focal length of perhaps 800mm is coupled with a smaller curved mirror that intercepts the last 200mm and extends it to 800mm, a 4x extension, so that the effective focal length of that objective is 3200mm. Use that with a 25mm eyepiece and the magnification is 3200/25 = 128. By the way, if a telescope is smaller than you are, it is seldom much use to view using a magnification greater than 50 to 100. Most objects are best viewed at relatively low powers such as 30 or so.
The magnification of a telescope is changed by changing the what?
The magnification of a telescope is changed by changing the focal length of the eyepiece or the objective lens. By adjusting the distance between these optical elements, the magnification of the telescope can be altered.
Does the diameter of a telescope control its magnification?
No, the diameter of a telescope's objective lens or mirror determines its light-gathering ability and resolving power, while the magnification is determined by the ratio of the focal length of the objective lens or mirror to the eyepiece.
What is the formula for light gathering power for telescopes?
The formula for light gathering power for telescopes is proportional to the square of the diameter of the objective lens (or mirror) of the telescope. This can be calculated using the formula: Light gathering power = (Diameter of objective lens)^2.
What is the Magnification equation for convex mirror?
The magnification equation for a convex mirror is given by: M = -1 / (1 - d/f), where M is the magnification, d is the object distance, and f is the focal length of the mirror. The negative sign indicates that the image formed is virtual and upright.
If the primary mirror of a telescope have a focal length of 225 centimeters and the eyepiece has a focal length of 7.5 millimeters then what is the magnifying power of the telescope?
The magnifying power of a telescope is the focal length of the scope in millimeters, divided by the focal length of the eyepiece in millimeters. Focal length of scope: 225cm=2250mm Focal length of eyepiece: 7.5mm 2250/7.5= 300X
How do you use a reflector telescope?
The magnification of any reflector telescope is given by the focal length of the mirror divided by the focal length of the eyepiece, so if the mirror's focal length is 1000mm and the eyepiece has a focal length of 10mm, then the magnification is 1000 / 10 or 100 X magnification. So, if you wish to increase the magnification you need to either change the mirror (which is impractical) or change the eyepiece (which is easy) replacing it with an eyepiece with a shorter focal length. So, if the new eyepiece has a focal length of 5mm then the magnification is 1000/5 or 200 X magnification. If you do not wish to buy an expensive complete set of eyepieces, you can buy what is called a Barlow lens which fits between the eyepiece and the telescope. These can increase the magnification by a factor of 2 or 3, but the quality of the image is not so good (as the light has to pass through the Barlow lens as well as the eyepiece). Do not forget that you cannot keep increasing magnification hoping to get better and better images. As you double the magnification, you cut the light entering the telescope by at least a half, so the image is dimmer. Most small telescopes with mirrors between 6 and 8 inches can magnify up to around 100 X effectively but anything more than this will result in the image becoming progressively darker, more grainy and generally not so clear. To get higher magnification you need much bigger mirrors of 10 or 12 inches or more. To add further complications, you will also need a substantial mount for the 'scope as any small vibration at a high magnification will result in a great deal of image shake. Also, you will need a really good motor drive to compensate for the movement of the earth, as, without such a drive at high magnifications, the image will move out of the field of view almost as quickly as you find it due to the earth's motion.
