Figure A4-II Goniometer mechanism embodying the CIE angular system 1: First Axis I: Illumination Axis α: Observation angle 2: Second Axis O: Observation Axis ß1, ß2: Entrance angles R: Reference Axis ε: Rotation angle P: Retro-reflective material Figure A4-II represents a Goniometer mechanism embodying the CIE angular system for specifying and measuring retro-reflective device and marking materials.

Dark fieldmicroscopy

Electricity Supply & Illumination Standards An electric sub-station/ Transformer may be provided in the bus terminal for electric supply to the Bus Terminal Facility.

In science class, you always wished you could play with the microscope a little bit longer. Now that you are an adult, you actually can. Cooler and with more bang for your buck than r/telescopes, microscopy lets you do real science!

I don't understand much about them. Can you use both on one microscope, or do you need a certain type of microscope? Could someone please explain to me-? Thank you lol