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Author Question: An object is placed 25 cm in front of a lens of focal length 20 cm. 60 cm past the first lens is a ... (Read 72 times)

imowrer

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on: Jul 28, 2018
An object is placed 25 cm in front of a lens of focal length 20 cm. 60 cm past the first lens is a second lens of focal length 25 cm. How far past the 25 cm lens does the final image form?
 a. 20 cm
  b. 40 cm
  c. 16 cm
  d. 25 cm
  e. 47 cm

Question 2

Long-period comets are believed to come from the ______________.
 Fill in the blank(s) with correct word


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quynhmickitran

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Reply #1 on: Jul 28, 2018
Answer to Question 1

c

Answer to Question 2

Oort cloud


imowrer

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Reply 2 on: Jul 28, 2018
Excellent

marict

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

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