Below are examples of different kinds of images along the electromagnetic spectrum. Infrared, x-rays, radio waves, ultraviolet, ultrasound and even down to the atomic level, there are examples of all different types of images with estimations of the resolutions worked out as well. If you don't know how to work out resolution, you can find out here: [How to] Calculate Resolution Of An Image.
1) This image is an example of infrared imaging from the electromagnetic spectrum with a wavelength longer than the visible region.
If you are revising Physics Topics, please have a look at other articles I have done on Physics you may be interested in.