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The US uses about 8 x 1019 J of energy per year. How much mass would that require if we could totally convert mass to energy? If the mass came from, say, turning used cars entirely into energy, estimate how many would be required?
Astronaut Flo wishes to travel to a star 20 light years away
Light requires 4.5 years to travel from the nearest star to earth
You drive past a potential parking space in center city. Your new car
Mr. Electron is about to head home after a hard day at work. His usual route is 10 mm long, but he can also take a short-cut that is only 9.5 mm long. (He's an electron! The distances are short!) If he strolls along at his usual 0.725 m/s, why can M
If the wavelength of a photon and the wavelength of an an electron are both 250 nm, calculate the ratio of the photon energy to the electron energy. Which has the greater energy?
10,000 electrons go through a double slit to form an interference pattern. At one location we measure 144 electrons. What is the magnitude of the wavefunction at that location?
To use an electron microscope to view Corona Virus particles of 50 nm diameter, what can you say about the wavelength of the electrons? What must their speed be?
Does the notion of matter waves mean that you can be in two places at once?
Two sources of electromagnetic radiation are in phase
A Michelson interferometer is illuminated with 500 nm light. One of the mirrors is moved so that 1000 fringes move past the crosshairs of the observing telescope. How much has the mirror moved?
A Michelson interferometer is illuminated with 500 nm light. One of the mirrors is moved so that 1000 fringes move past the crosshairs of the observing telescope. How much has the mirror moved?
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