1,202 reputation
411
bio website daniel.farrell.name
location Tokyo, Japan
age
visits member for 4 years, 7 months
seen 2 hours ago

I know how to use the grey square -- do you?


1d
comment Definition of luminescence
I think that is a good definition within the context of solid state physics. You could also say something like, "emission resulting in radiation with chemical potential", but this is perhaps too narrow a definition! I generally think of luminescence as radiation resulting from electronic recombination where the electronic population is in an excited state (i.e. not in chemical equilibrium).
Aug
25
comment What is the relationship between entropy and work?
Yes, it's called the Carnot Efficiency, en.m.wikipedia.org/wiki/Carnot%27s_theorem_(thermodynamics) but to derive it you have to assume conservation of energy and entropy.
Aug
25
revised What is the relationship between entropy and work?
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Aug
25
comment What is the relationship between entropy and work?
Yeah that's better phrasing, thanks. Updated.
Aug
25
revised What is the relationship between entropy and work?
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Aug
25
revised What is the relationship between entropy and work?
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Aug
25
answered What is the relationship between entropy and work?
Aug
20
comment Spherical and chromatic aberration correction
Why not use a microscopy lens? Internally they have multiple lenses which can correct for abbreviation.
Aug
20
answered Sign convention for mirror and lens formulas
Aug
20
answered Is heat always associated with Light?
Aug
15
comment Way of measuring thickness of a glass
Too should really add your ideas first....
Aug
14
comment Material that changes transparency when lased from side?
Saturable absorption mirrors rp-photonics.com/semiconductor_saturable_absorber_mirrors.html
Aug
13
revised Would an ordinary or fluorescent lightbulb generate electricity when exposed to light?
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Aug
13
answered Would an ordinary or fluorescent lightbulb generate electricity when exposed to light?
Aug
13
answered Work done of the gas
Aug
8
answered How to calculate the potential of a photocell?
Aug
7
answered Refraction of white light through a glass slab: what does it actually look like?
Aug
2
revised What is the total internal reflection?
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Aug
2
answered What is the total internal reflection?
Aug
1
comment How will open-circuit voltage affect the Fermi Level Difference
This is not specific enough to answer. What materials? What are the Fermi-levels locations? When materials come into contact the Fermi-levels align until a space charge halts any further change.