The lines can be traced out with a compass. The needle is like a permanent magnet and the north indicator is the north end of a magnet.
Answer:
the radii of curvature is 30 cm.
Explanation:
given,
object is place at = 45 cm
image appears at = 90 cm
focal length = ?
refractive index = 1.5
radii of curvature = ?


f = 30 cm
using lens formula





R = 30 cm
hence, the radii of curvature is 30 cm.
C......................................
Answer:
A. Wegener could not explain what made the continents move.
Explanation:
Is there an image that goes with this question?