MagnaView Film is a great way to view and demonstrate the effects of magnetic fields without the potential mess of MagnaView Liquid. Our Magnaview Film
sheets measure 3" x 3" . This green magnetic viewing film will become lighter or darker when a magnetic field is applied. It turns dark when the field lines are perpendicular the surface, and it turns light when the field lines are horizontal, i.e., across the surface allowing the user to see the magnetic field around a magnet. MagnaView Film is a unique approach to visualizing Magnetism and a captivating experiment for all ages. One sheet per package.