Magnetism and photographic imagery

Using the Faraday Effect, you might have some interaction between magnetism and light, but not with the emulsion itself. Generally, except for a few carefully controlled situations, magnetism does not influence chemical reactions. But, why don't you try it yourself?

PE

You could also try the Surface Magneto-Optical Kerr Effect - otherwise known as SMOKE -
but you might also need some MIRRORS...