PH301 Modern Physics Fall 2000

The exam will contain 10 multiple choice questions, and 6 problems requiring

calculation, explanation, and/or derivation. You may use a calculator and one

3"X5" card of handwritten equations.

Topics to review for first exam:

• CLASSICAL RELATIVITY
• def of inertial frame
• postulates
• good approx when v<<c
• EINSTEIN'S POSTULATES
• What are they?
• Why expect speed of light to be the same for all observers?
• LORENTZ TRANSFORMATIONS
• derived by assuming speed of light is same for both observers
• using eqns in calculations
• LENGTH CONTRACTION
• when one observer views proper length
• def of proper length
• using eqns (only contracted along dir of motion)
• TIME DILATION
• when one observer views proper time
• def of proper time
• using equations
• SIMULTANEITY
• is not absolute (unless two events also happen at same place)
• DOPPLER EFFECT
• derived by assuming speed of light is same for both observers
• using equations
• red shift/blue shift
• VELOCITY TRANSFORMATION
• using equations; along dir of v (x-axis) / perpendicular to v (y & z-axes)
• be careful of signs and distinguishing u, u', v
• RELATIVISTIC MOMENTUM, ENERGY, AND KINETIC ENERGY
• momentum and energy are conserved
• using equations
• why massive object cannot travel at speed c/ why light can