Modern Physics PHY 36001

Question 1.

Galilean transformations leave Newton's Law F = ma invariant.

      True
      False

Question 2.

Relativistic Doppler shift makes no reference to the medium in which the lightwave propagates.

      True
      False

Question 3.

Since E² = (mc²)² + (pc)², if a lightwave has an energy it must also have a rest mass.

      True
      False

Question 4.

An inertial frame is one in which an observer will see objects

      a. always at rest.
      b. move with constant velocity unless acted on by a force.
      c. move under the influence of forces such as the coriolis force.
      d. move under the influence of the centrifugal force.

Question 5.

Michelson and Morley's experiment was designed to search for the Ether which is a

      a. noxious gas used as an anesthetic early this century.
      b. material which is associated with creation of space-time worm holes.
      c. chemical medium helpful in measuring photo-electric diffraction patterns.
      d. massless, invisible medium which exists solely for the propagation of lightwaves.

Question 6.

The Einstein Second Postulate of Relativity states that

      a. the speed of light is a constant, the same for all inertial observers.
      b. time is the same for all observers.
      c. its all relative, dude.
      d. the sun is at the center of the solar system.

Question 7.

The proper time is defined as the

      a. time is takes to eat at a fine restaurant.
      b. true time between two events.
      c. time between two events as measured by an observer in the rest frame of the events.
      d. time that a particle lives without decaying.

Question 8.

The transformation which preserves Maxwell's Equations and satisfies Einstein's postulates is called the

      a. Special Unitary transformation.
      b. Unitarity transformation.
      c. Galilean transformation.
      d. Lorentz transformation.

Question 9.

In Einstein's famous equation E² = (mc²)² + (pc)², the constant m refers to the

      a. renormalized mass.
      b. bare mass.
      c. rest mass.
      d. relativistic mass.