looking through a small hole
37531
Pinhole camera: How "How to See Without Your Glasses" works?
120266
The Double Slit Experiment - delayed measurement
11807
Chasing something that doesn't exist
89205
Image under an entire function.
102041
Pinpoint the area light to object
13529
Smallest data URI image possible for a transparent image
74731
Direct Image by a Blow up
43480
Visualizing the 4th dimension.
127543
Determining the path of a light ray
90503
Period of oscillation through a hole in the earth
138980
Hidden observers in Double Slit experiments - Do they matter?
2341
An expression that adds little information
87968
A strange puzzle having two possible solutions
85593
Is fluorescence from a single atom/ion visible with the naked eye (e.g. in a strongly coupled trap or cavity)
47317
Variation of ladder/barn paradox: can observer on ladder see that barn was too small?
98147
How to see object from multiple perspectives in real time
127351
Why can we only "see" reflected light?