A converging lens with the same curvature on both faces and a ...

[JMatthes]

A converging lens with the same curvature on both faces and a focal length of 25 cm is to be made from crown glass having a refractive index of 1.52. What radius of curvature is required for each face?
 
  What will be an ideal response?

Question 2

A flat circular loop of wire of radius 0.50 m that is carrying a 2.0-A current is in a uniform magnetic field of 0.30 T. What is the magnitude of the magnetic torque on the loop when the plane of its area is perpendicular to the magnetic field?
 
  A) 0.00 N  m
  B) 0.41 N  m
  C) 0.47 N  m
  D) 0.52 N  m
  E) 0.58 N  m

[emily12345]

Answer to Question 1

26 cm

Answer to Question 2

A

[JMatthes]

Thanks for the timely response, appreciate it

[FergA]

Wow, this really help