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Author Question: The objective lens of a refracting astronomical telescope has a focal length of 60 cm, and the ... (Read 33 times)

faduma

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on: Jul 29, 2018
The objective lens of a refracting astronomical telescope has a focal length of 60 cm, and the eyepiece has a focal length of 2.0 cm. How far apart should the lenses be placed in order to form a final image at infinity?
 
  A) 60 cm B) 58 cm C) 76 cm D) 44 cm E) 62 cm

Question 2

A pendulum of length L is suspended from the ceiling of an elevator. When the elevator is at rest the period of the pendulum is T.
 
  How would the period of the pendulum change if the supporting chain were to break, putting the elevator into freefall? A) The period does not change.
  B) The period increases slightly.
  C) The period decreases slightly.
  D) The period becomes zero.
  E) The period becomes infinite because the pendulum would not swing.
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flannelavenger

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Reply #1 on: Jul 29, 2018
Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
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faduma

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Reply 2 on: Jul 29, 2018
Gracias!

xiaomengxian

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Reply 3 on: Yesterday
Wow, this really help

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