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Author Question: How far from a lens having a focal length of +50 mm must the object be placed if it is to form a ... (Read 46 times)

jlmhmf

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on: Jul 29, 2018
How far from a lens having a focal length of +50 mm must the object be placed if it is to form a virtual image that is 3.0 times the size of the object?
 
  A) 33 mm
  B) 42 mm
  C) 48 mm
  D) 54 mm

Question 2

A drawing is placed 40 cm in front of a thin lens. If a virtual image forms at a distance of 50 cm from the lens, on the same side as the drawing, what is the focal length of the lens?
 
  A) -45 cm
  B) 75 cm
  C) 90 cm
  D) 200 cm
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AmberC1996

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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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jlmhmf

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Reply 2 on: Jul 29, 2018
:D TYSM

amcvicar

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Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

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