Recent content by Janusz Bednarski

  1. Janusz Bednarski

    How Does Voltage Affect LED Color Through Band Gap Adjustments?

    Hi! This question is translated so that's why it might sound a bit weird. I know that the answer should mention the band diagram of the LED, and I think that the answer is to introduce an electrical contact connected to a voltage source. Then when you increase the voltage, it should attract the...
  2. Janusz Bednarski

    Uncertainty principle if only one velocity direction is known

    Oh, so you think that the answer should be 0?
  3. Janusz Bednarski

    Uncertainty principle if only one velocity direction is known

    Oh haha yes I meant just m.
  4. Janusz Bednarski

    Uncertainty principle if only one velocity direction is known

    Yes, it's from an old exam in the course I'm taking right now.
  5. Janusz Bednarski

    Uncertainty principle if only one velocity direction is known

    I calculated the answer for question a to be about 10^-6 m/s (1 significant figure), but I am stuck on question b. It seems to me that it is a trick question because we don't know anything about the speed in the y-direction, and the answer can be everything from 0 to infinity. Am I right?