with Light Microscopy and nuclear magnetic resonance.

without physics, how could we see?

How to see a cell = fluorescence microscopy
How to see a crystal sample of a drug that can be used to inhibit the growth of cancer cells = single x-ray diffraction

                 

An x-ray spectrometer Image source: wikipedia.                                         Image source for ray diagram: physics stack exchange

                                       
                                        NMR readings on a novel compound I made in my year as an undergrad researcher.