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3) Find out the Focal

The Yerkes refracting telescope has a 1 mdiameter objective lens of focal length 20 m.Assume it is used with an eyepiece of
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2. asked by Jim
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Two plus lenses have focal lengths in the ratio 3:1. When placed together in close contact the focal length of the combination
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2. asked by Nikki
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I was asked to compare my measured focal length to my calculated focal length. My calculated focal length I figured out by using
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2. asked by Lena
3. 587 views
Two plus lenses have focal lengths in the ratio 7:1. When placed together in close contact the focal length of the combination
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2. asked by shaky
3. 722 views
A converging lens of focal length 7.740 cm is 19.7 cm to the left of a diverging lens of focal length -5.51 cm. A coin is placed
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2. asked by marisol
3. 578 views
FPA stands for what?Focal performance adjustment Focal plane array Focus positioning agent
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2. 36 views
Which of the following adjustments would cause an image to change from real to virtual?a)moving the object from the focal point
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2. asked by Hi
3. 3,778 views
A 1.00-cm-high object is placed 3.10 cm to the left of a converging lens of focal length 8.30 cm. A diverging lens of focal
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2. asked by Tyrone
3. 683 views
A bi-convex lens with the focal length of 25 cm and a meniscus concave lens with the focal length of 10 cm, separated from each
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2. asked by Me
3. 274 views
What focal-length lens would you need to place next to a converging lens of focal length 29 cm to create an effective focal
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2. asked by Jeanette
3. 574 views