Contents:
0:00 Introducing "rays"
2:14 Light is a wave
4:00 Nils reached one thousand!
4:43 Effect of Numerical Aperture
6:46 About "Critical Dimension"
7:40 Effect of NA illustrated using a microscope
10:44 Diffraction in the Double Slit Experiment
12:30 Diffraction in the Circular Slits (Fresnel Zone Plates)
14:40 Effect of central obstruction on focus
15:05 Using diffraction to create an Image
18:59 Comparison to the Fourier Series Approximation
19:44 Image Creation and JPEG compression
20:59 Effect of wavelength on definition
21:35 Extroduction

A list of links to subjects mentioned in the video:
Nils Berglund's Channel:    / nilsberglund  
Link to the full "NA" video by Nils:    • Numerical aperture of a lens in a wal...  
Making Fresnel Zone plates:    • Making Tiny Fresnel Lenses during a P...  
Building a Maskless Wafer Stepper:    • Maskless Wafer Stepper Part1: Optics  

Some images were taken from JW Middelink Systematische Natuurkunde Deel B.
This book series is absolutely awesome. They made me enjoy my high school physics classes and that is why I held on to them for 40 years.

The video contains a short audio clip that is inspired on "another one bites the dust" by Queen. I did not use the original drums and bass but, Freddy himself did contribute in his own special way. I consider this fair use but if you are the copyright owner, please contact me in case you consider this a copyright breach. Today on the date of video publication it is 32 years ago exactly that Freddy Mercury died of Aids.

Apparently, the lady in the compression images is named Lena. If I had known the history behind the image and why it became so famous, I would probably not have used it:
https://pursuit.unimelb.edu.au/articl...

A correction about the name of ASML: currently, this is the actual name of the company, so without any reference to the origin of the abbreviation. Advanced Semiconductor Materials Lithography was the name of the joint venture of ASM (founded by Arthur del Prado) and Philips Electronics, intended for the development of photolithography machines.

Did I forget to mention you? Please contact me and I will sort it out.