User Sparkler

28 votes

2 answers

20k views

Why do non-hydrogen atomic orbitals have the same degeneracy structure as hydrogen orbitals?

asked Feb 18, 2016 at 15:43

20 votes

3 answers

9k views

Why iron filings sprinkled near a bar magnet aggregate into separated chunks?

asked Jul 31, 2017 at 4:19

19 votes

2 answers

7k views

Why fast eye movement splits a white LED into the RGB components?

asked Sep 20, 2015 at 0:27

17 votes

5 answers

7k views

How many photons are needed to make a light wave?

asked Jul 20, 2016 at 17:24

11 votes

3 answers

16k views

Why absorption spectum is not identical to emission spectrum?

asked Feb 18, 2016 at 20:21

10 votes

2 answers

8k views

What is the physical meaning of complex eigenvalues?

asked Oct 14, 2014 at 20:49

8 votes

4 answers

7k views

Can a photon be absorbed by a proton?

asked Nov 10, 2015 at 22:10

7 votes

1 answer

378 views

What is the max frequency of sound in a given medium?

asked May 18, 2016 at 13:54

6 votes

4 answers

2k views

What carries electric field through space?

asked Feb 25, 2016 at 23:37

6 votes

1 answer

661 views

Does the contact angle of a drop depend theoretically on the size of the drop?

asked May 14, 2015 at 0:00

4 votes

1 answer

640 views

Can a strained diamond actually become conductive?

asked Dec 6, 2014 at 3:52

4 votes

3 answers

3k views

What limits the doping concentration in a semiconductor?

asked Dec 6, 2014 at 5:22

4 votes

3 answers

3k views

Why is boiling not just a surface phenomenon?

asked Sep 15, 2015 at 16:49

4 votes

3 answers

174 views

Would a bag of neutrons have temperature?

asked Jan 19, 2016 at 15:53

4 votes

1 answer

824 views

Why 8–15 µm is considered "thermal infrared" if typical room temperature kT is 48 µm?

asked Mar 26, 2016 at 5:26

4 votes

3 answers

2k views

Why white flat surfaces are white and not mirror-like reflective?

asked Dec 15, 2016 at 3:37

4 votes

2 answers

303 views

Why doped silicon does not undergo electrostatic discharge?

asked Jul 16, 2016 at 17:18

3 votes

2 answers

545 views

Why the Du Noüy ring method does not depend on the material the ring is made of?

asked Apr 8, 2016 at 23:27

3 votes

1 answer

90 views

Does charge injection from electrodes increases the total charge in a (semi)conductive channel?

asked May 16, 2016 at 22:33

3 votes

1 answer

596 views

What is the meaning of the integral of position? [duplicate]

asked Dec 14, 2015 at 14:18

3 votes

1 answer

815 views

Why vacuuming an air chamber is much slower than vacuuming an argon chamber?

asked Sep 17, 2015 at 20:21

3 votes

3 answers

4k views

How is complex permittivity measured?

asked Oct 7, 2015 at 1:43

3 votes

1 answer

6k views

Why the minority carrier lifetime is different for electrons and holes?

asked Oct 11, 2014 at 3:43

3 votes

2 answers

8k views

How are band gap energy, dielectric constant (permittivity) and resistance related to each other?

asked Dec 5, 2014 at 20:08

3 votes

2 answers

6k views

What's the difference between NMR and EPR?

asked Mar 19, 2015 at 18:43

3 votes

1 answer

894 views

Why Fermi level doesn't change with temperature?

asked Jun 18, 2015 at 16:53

3 votes

2 answers

6k views

Why the optical gap is not identical to the charge gap?

asked Aug 5, 2015 at 23:33

3 votes

1 answer

937 views

What happens to running water in sub-zero environment?

asked Feb 11, 2015 at 18:00

3 votes

1 answer

733 views

Why grating is an essential part of a monochromator?

asked Feb 25, 2015 at 23:53

2 votes

1 answer

50 views

Why zone-plate photography is not monochromatic?

asked Feb 26, 2015 at 3:13

Stack Exchange Network

108 Questions

Why do non-hydrogen atomic orbitals have the same degeneracy structure as hydrogen orbitals?

Why iron filings sprinkled near a bar magnet aggregate into separated chunks?

Why fast eye movement splits a white LED into the RGB components?

How many photons are needed to make a light wave?

Why absorption spectum is not identical to emission spectrum?

What is the physical meaning of complex eigenvalues?

Can a photon be absorbed by a proton?

What is the max frequency of sound in a given medium?

What carries electric field through space?

Does the contact angle of a drop depend theoretically on the size of the drop?

Can a strained diamond actually become conductive?

What limits the doping concentration in a semiconductor?

Why is boiling not just a surface phenomenon?

Would a bag of neutrons have temperature?

Why 8–15 µm is considered "thermal infrared" if typical room temperature kT is 48 µm?

Why white flat surfaces are white and not mirror-like reflective?

Why doped silicon does not undergo electrostatic discharge?

Why the Du Noüy ring method does not depend on the material the ring is made of?

Does charge injection from electrodes increases the total charge in a (semi)conductive channel?

What is the meaning of the integral of position? [duplicate]

Why vacuuming an air chamber is much slower than vacuuming an argon chamber?

How is complex permittivity measured?

Why the minority carrier lifetime is different for electrons and holes?

How are band gap energy, dielectric constant (permittivity) and resistance related to each other?

What's the difference between NMR and EPR?

Why Fermi level doesn't change with temperature?

Why the optical gap is not identical to the charge gap?

What happens to running water in sub-zero environment?

Why grating is an essential part of a monochromator?

Why zone-plate photography is not monochromatic?