The focal lengths of the objective and the eyepiece in a ...

[tiffannnnyyyyyy]

The focal lengths of the objective and the eyepiece in a microscope are 0.29 cm and 2.50 cm, respectively. An object is placed at 0.30 cm from the objective lens and the image of this object is viewed with the eyepiece adjusted for minimum eyestrain.
 
  The near-point distance of the person using the microscope is 25.0 cm. What is the final magnification of the microscope? A) -190
  B) -240
  C) -300
  D) -310
  E) -470

Question 2

An object is placed 50 cm in front of a concave mirror with a focal length of 25 cm. What is the magnification?
 
  A) -0.50
  B) -1.0
  C) -1.5
  D) -2.0
  E) -2.5

[mistyjohnson]

Answer to Question 1

C

Answer to Question 2

B