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Author Question: A lens of focal length 25 cm is placed 50 cm from an object. On the opposite side of the lens at a ... (Read 36 times)

tth

  • Hero Member
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  • Posts: 579
on: Jul 29, 2018
A lens of focal length 25 cm is placed 50 cm from an object. On the opposite side of the lens at a distance of 50 cm is a plane mirror. Where is the final image formed?
 
  A)
 
  50 cm from the lens on the object side
  B)
 
  35 cm behind the mirror
  C)
 
  35 cm in front of the mirror
  D)
 
  50 cm from the lens on the mirror side
  E)
 
  35 cm from the lens on the object side

Question 2

At what peak wavelength does an object at 37C (98.6F) radiate?
 
  A)
 
  94  10-6 m
  B)
 
  9.4  10-6 m
  C)
 
  29  10-6 m
  D)
 
  7.8  10-6 m
  E)
 
  78  10-6 m


kthug

  • Sr. Member
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  • Posts: 332
Reply #1 on: Jul 29, 2018
Answer to Question 1

A

Answer to Question 2

B


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