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Multiple choice questions. 1 mark each. A spaceship moves towards you at 1/3c, where c is the speed of light. The spaceship emits a beam of light in your direction. As measured in your frame of reference, the speed of the light emitted by the spaceship is:

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they only apply to the behaviour of microscopic particles, like electrons
they apply only to inanimate objects like clocks and rods, and not to human beings
they are only noticeable at speeds much higher than we normally experience
our intuition is based on experiences we have as infants, before we learn any physics
muons are unstable and decay into a different form of matter in a small fraction of a second
muons are created by cosmic rays in the upper atmosphere
muons travel at speeds very close to the speed of light
muons decay in the upper atmosphere and hardly ever make it to the Earth's surface
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be able to move faster than the speed of light
be able to send messages back in time
be able to travel back in time
be able to travel forward in time
decreases by a factor of two
decreases by a factor of four
increases by a factor of two
increases by a factor of four
its weight decreases and its mass stays the same.
its weight and mass decrease
its weight increases and its mass stays the same
its weight and mass stay the same.
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moves fastest when it is furthest from the sun.
moves fastest when it is closest to the sun.
has an orbital period whose square is proportional to the cube of the semi-major axis of the orbit
will eventually lose its kinetic energy and spiral into the sun
Newton's theory predicted the wrong perihelion shift for Mercury
Newton's theory was inconsistent with the special theory of relativity
Newton's theory did not explain why planets moved in elliptical orbits
Newton's theory did not explain why gravitational forces are proportional to inertial mass.
They are essentially a region of space from which nothing, not even light can escape
Space around black holes is curved
At the center of a black hole is a singularity, where the laws of physics break down.
The space around a black hole is completely black, containing no radiation
An electron has a smaller mass than the nucleus.
The energy of the electron is fixed as long as it stays in a particular orbital.
An electron has a negative charge.
An electron continuously radiates light as it orbits the nucleus in a particular orbital.
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when heated, no light will be emitted from an atom.
atoms decay in a very short time.
when heated, only light of very low wavelengths is emitted.
Electrons spontaneously jump from lower to higher energy levels, emitting photons.
Most of the mass of the atom is contained in the nucleus.
Electrons circle the nucleus in discrete orbits.
The Coulomb force between electrons and protons holds the atom together.
It requires an incoming photon of precisely the right energy
Two photons of slightly different energies are emitted
It is the basis for the operation of lasers
During the emission process an electron goes from a higher to a lower energy level in the atom
provides the basis for generating modern-day lasers.
can only be observed if photons of exactly the right frequency are used
demonstrates that light has a particle nature.
shows that electrons sometimes behave like waves
under no circumstances.
in their behaviour in electrical circuits.
when used in diffraction experiments.
when colliding with other electrons in a wire.
knowing the exact position also tells us exactly the speed.
determining the position more accurately leads to a more accurate determination of the speed.
determining the position more accurately leads to a less accurate determination of the speed.
the accuracy of knowing the position is independent of the accuracy of knowing the speed.
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the energy of the electrons is relatively low.
the electrons have a relatively small de Broglie wavelength.
the electrons have a relatively large de Broglie wavelength.
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Bowling balls normally have an extremely short de Broglie wavelength.
Bowling balls normally have an extremely long de Broglie wavelength.
Bowling balls are usually electrically neutral.
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helium burning phase, hydrogen burning phase, nebular collapse
nebular collapse, hydrogen burning phase, helium burning phase
hydrogen burning phase, helium burning phase, nebular collapse
hydrogen burning phase, nebular collapse, helium burning phase
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gabor@theory.uwinnipeg.ca
2001-04-04