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awarded  Curious
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comment Why can't incoherent light be collimated as well as laser light (e.g. in a laser pointer)?
@DanielSank - I've clarified the title.
2d
revised Why can't incoherent light be collimated as well as laser light (e.g. in a laser pointer)?
Clarified the title.
2d
comment Why can't incoherent light be collimated as well as laser light (e.g. in a laser pointer)?
Thanks anna, this is an interesting answer, but I don't see how it answers the question. Is the same thing true of a laser diode?
2d
asked Why can't incoherent light be collimated as well as laser light (e.g. in a laser pointer)?
Apr
3
asked Is the photoelectric effect 'Ionising Radiation'?
Mar
31
awarded  Notable Question
Jan
22
awarded  Good Question
Sep
2
comment How much disolved oxygen is removed by boiling water?
Can you address the last paragraph of the question? Is re-boiling the kettle likely to make much difference to the amount of dissolved oxygen? Or, to put it another way, when you raise the temperature of the water, how long does it take for the oxygen to reach its new level?
Jul
25
awarded  Nice Question
Mar
11
awarded  Notable Question
Jan
18
awarded  Nice Answer
Jun
3
awarded  Yearling
May
30
answered What is difference between white objects and transparent objects as far as photons are concerned?
May
29
revised Is Newton's third law always correct?
Added Veritasium Video
May
29
revised Is Newton's third law always correct?
Oops, obviously hadn't proof read that before I posted it!
May
29
comment Is Newton's third law always correct?
@Jason - You're welcome.
May
28
answered Is Newton's third law always correct?
May
28
awarded  Critic
May
2
awarded  Popular Question