The image of a plant is 4.0 cm from a concave spherical mirror ...

[formula1]

The image of a plant is 4.0 cm from a concave spherical mirror having a radius of curvature of 10 cm. Where is the plant relative to the mirror?
 
  A) 2.2 cm in front of the mirror
  B) 20 cm in front of the mirror
  C) 4.4 cm in front of the mirror
  D) 1.0 cm in front of the mirror
  E) 9.0 cm in front of the mirror

Question 2

An important reason for using a very large diameter objective in an astronomical telescope is
 
  A)
 
  to increase the magnification.
  B)
 
  to increase the resolution.
  C)
 
  to form a virtual image, which is easier to look at.
  D)
 
  to increase the width of the field of view.
  E)
 
  to increase the depth of the field of view.

[Mochi]

Answer to Question 1

A

Answer to Question 2

B

[formula1]

Thanks for the timely response, appreciate it

[xiazhe]

Great answer, keep it coming