Physics - Optics: Circular Aperture - Angle of Resolution (3 of 6) Resolution Power of the Human Eye

In this video I will explain the resolution ability of the human eye..

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[RayleighCriterion]

That was very generous on the Angular Resolution of human vision, going down just 31½ arc seconds, which I doubt anyone has such good vision. Most people are limited to about 60 arc seconds and a very small percentage with excellent vision might achieve 40 arc seconds, these would be a person who can score 20/10 on the Snellen vision chart.

[amosgabrielodhiamboamosowi]

Your explanations are very clear. Thanks for sharing.

[garywybenga]

The moon rose at 82° that day. The sun rose at 80° 3 minutes after the moon.
The sun set at 280° and the moon set about 20 minutes later at 283°
So the moon was slightly south of the sun when the rose and slightly ahead. By the time they set the moon was further north of the sun and 20 minutes behind.
The moon crossed the path of the sun just before the sun was going to pass it. That's why the shadow started southwest when the sun was approaching it but still north of it in latitude and moved north east as the moon crossed in front and the sun passed by to its south to make the shadow go north east

[erezshidlov]

Hi,
I have a question:
You arrived at the formula for Theta, for the diffraction pattern on the screen/retina, but when you look at the light sources (like the hair or the moon crater) it's on the other side of the lens/aperture, and I don't understand why does the formula apply for the source side.
Who guarantees that when 2 Airy discs don't overlap on the source side, they don't overlap on the screen/retina side ?
I understand that there is a light source vs screen symmetry here (that is to say they are inter-changable), but aren't we assuming that we get a diffraction pattern on one side because we have a point source on the other side ? (The Airy disc is usually derived assuming planar waves arriving the aperture/lens)



Thanks a lot !!!
Very good and informative videos ! helped me a lot, keep up the fruitful work !

[don_wild]

It's theoretical limit of eye's resolution, right?
Otherwise, how can you explain known fact that birds of prey have a much better sight than humans, while having a smaller pupil size?

[Marco]

I don't understand something. Using formula: d=L sin ø

Do I plug in the sine in radians or degrees? You used both and my gut tells me it's not right.

[shaunkiya]

Sir what would be the effect of using spectacles on resolution formula . How to calculate please tell ..

[ManojKumar-cjoj]

And its due to the size of aprature that gaves us this inability

[Pierrericheart]

Too much math bro. This makes no sense to someone who is not a calculus expert. You dont even explain what 1.22 is!