Scientific photography involves the use of wide ranging photographic techniques to measure and evaluate phenomena which are invisible to the human eye.  This may be because the subject is too fast, too slow, too small, too dangerous or is visible to parts of the electromagnetic spectrum that are not shared by the human eye

Techniques used involve :-

Birefringence photography

High speed filming

High speed flash

Macrophotography

Photomicrography

Schlieren photography

Time Lapse

Ultra-violet crack detection

and many others.

Photomicrography of crimped wire

High speed flash @ 12 microseconds

Birefringence stress detection