19:22
What is the Basic Structure of the Sun?
96 views • 6 months ago
25:03
Where Does The Sun's Energy Come From?
229 views • 6 months ago
9:12
Why is Magnetism Important on the Sun?
66 views • 6 months ago
13:17
Neutrinos: Messengers from the Center of the Sun
39 views • 6 months ago
32:55
Telescopes
29 views • 6 months ago
13:02
An Introduction to Stellarium
85 views • 6 months ago
12:03
Skydiving and Terminal Velocity
98 views • 1 year ago
3:51
Using The SteadyPix Phone Adapter
211 views • 1 year ago
6:04
Using The SkyScanner 100
2.9K views • 1 year ago
1:47
Try this one simple trick to understanding moon phases
222 views • 3 years ago
7:17
Addendum: "How Close Do I Have To Get To The Moon To Be Pulled Harder By Its Gravity Than Earth's?"
111 views • 3 years ago
9:08
How Close Do I Have To Get To The Moon To Be Pulled Harder By Its Gravity Than Earth's?
251 views • 3 years ago
7:41
Where is the "balance point" between the Earth and Moon?
516 views • 3 years ago
5:07
Comparing Telescope Light-Collecting Areas
502 views • 3 years ago
4:16
How do we represent really small numbers?
102 views • 3 years ago
1:56
Image Formation by Half a Lens
595 views • 5 years ago
3:51
Demonstration of the Inverse Square Law for Light
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2:47
A Demonstration of Fiber Optics
525 views • 5 years ago
2:44
Diffraction Through a Narrow Slit
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4:14
image Formation by a Lens or Mirror
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4:38
Diffraction Gratings and Spectra
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2:17
Diffraction Through a Circular Hole
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5:11
Seasons
66 views • 5 years ago
6:56
Moon Phases
208 views • 5 years ago
7:52
Image Formation: Stamp 3
54 views • 6 years ago
7:45
Image Formation: Stamp 2
20 views • 6 years ago
7:04
Image Formation: Stamp 1
29 views • 6 years ago
3:34
Image Formation: Distant object
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Image Formation: Locust 2
8 views • 6 years ago
5:38
Image Formation: Locust 1
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