12 Questions
If the Obsession-20 telescope's mirror has a focal length of 2540 mm, what is the magnification when using the eyepiece in Prime Focus observing?
25x
What is the focal length of the human eye used as an eyepiece for the Obsession-20 telescope in Prime Focus observing?
250 mm
What is the focal length of the mirror of the Obsession-20 telescope used in Prime Focus observing?
2540 mm
If the focal length of the human eye was 1000 mm, what would be the magnification for the Obsession-20 telescope in Prime Focus observing?
17500x
What would be the magnification for the Obsession-20 telescope in Prime Focus observing if the eyepiece's focal length was 4 mm?
120x
In Prime Focus observing with the Obsession-20 telescope, what would be the magnification if there was no eyepiece used and only the human eye with a focal length of 1.83 cm was employed?
24x
What is the role of the eyepiece in a telescope?
To change the angle of the rays from the objective as they enter the eye
In the given proportion, what does H represent?
Image size produced by the eyepiece
What is the formula for calculating magnification in a telescope?
$F/f$
What is the magnification of the David Dunlap telescope?
57600
If an eyepiece was eliminated and the human eye was used instead, what effect would this have on the magnification of the image?
Have no effect on magnification
If an eyepiece with a focal length of 8 mm is used with an objective lens of 1600 mm, what is the magnification?
500
Learn how to calculate the magnification of a telescope using the focal lengths of lenses and the sizes of images. Understand the role of the objective mirror or lens and the eyepiece in magnifying distant objects.
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