Afocal arrangement that has a thin lens that the light passes through before traveling down the tube to the objective mirror is a
a. cassegrain focus
b. newtonian focus
c. schmidt-cassegrain focus
d. schmidt focus

The magnitude of the magnetic field at a certain distance from a long, straight conductor is represented by b. what is the magnitude of the magnetic field at twice the distance from the conductor? a. at twice the distance, the magnitude of the field is 4b.b. at twice the distance, the magnitude of the field is 2b.c. at twice the distance, the magnitude of the field is b/2.d. at twice the distance, the magnitude of the field is b/4.e. at twice the distance, the magnitude of the field remains equal to b.