Compasses line up with magnetic fields. A compass will line upA. Parallel to magnetic field lines, with the south pole pointing
in the direction of the field.B. Perpendicular to magnetic field lines.C. Parallel to magnetic field lines, with the north pole pointing in the direction of the field.D. Perpendicular to magnetic field lines, in a direction defined by the right-hand rule.
C. Parallel to magnetic field lines, with the north pole pointing in the direction of the field.
Explanation:
When a magnet is placed in magnetic field then its North pole and south pole will experience magnetic force in opposite directions.
North pole will tend to move in the direction of magnetic field while south pole has tendency to move opposite to it.
Due to this opposite direction force magnet will experience torque if it is inclined at some angle with magnetic field
Due to this torque magnet will align in the direction of magnetic field such that its north pole will point in the direction of external field while south pole is align opposite to that
A light wave is important because it tells about the intensity or brightness of a light relative to another light wave of the same wave length. It is a measure of how much energy the wave carries.
