Pedro A
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6 answers
78 votes
6k views
32 bookmarks
If gravity is a pseudoforce in general relativity, then why is a graviton necessary?
5 answers
57 votes
24k views
8 bookmarks
If I can see someone's eyes, can they see mine?
6 answers
54 votes
8k views
36 bookmarks
What is the connection between special and general relativity?
12 answers
44 votes
10k views
8 bookmarks
Is there any physical evidence for motion?
2 answers
37 votes
4k views
8 bookmarks
Can light be compressed?
4 answers
20 votes
8k views
10 bookmarks
Why does thermal radiation only occur at infrared and visible frequencies?
1 answers
14 votes
2k views
4 bookmarks
What is a base unit in the new SI, and why is the ampere one of them?
1 answers
2 votes
253 views
1 bookmarks
Compensating water pressure loss by gradually decreasing diameter of water pipes?
2 answers
2 votes
271 views
1 bookmarks
How mathematically accurate is this popular classroom demonstration of gravity?
1 answers
1 votes
4k views
4 bookmarks
Why is uncertainty divided by $\sqrt{3}$?