Relativistic Physics Quiz

What is one of the key postulates of special relativity regarding the speed of light?

• It varies in different inertial frames.

• It is constant in all inertial frames.

• It is faster in a vacuum.

• It slows down in a vacuum.

Why can't objects with mass travel faster than the speed of light?

• They gain infinite energy.

• They become invisible.

• They change color.

• They lose mass.

In classical physics, how is the velocity of a projectile relative to Earth calculated?

• By subtracting the spacecraft's velocity from the projectile's velocity.

• By multiplying the spacecraft's velocity with the projectile's velocity.

• By dividing the spacecraft's velocity by the projectile's velocity.

• By adding the spacecraft's velocity to the projectile's velocity.

What happens to classical velocity calculations as speeds approach the speed of light?

• They become more accurate.

• They become irrelevant.

• They remain unchanged.

• They become less accurate.

What is the Lorentz factor used for in relativistic physics?

• To determine the speed of light.

• To measure time dilation.

• To adjust mass and velocity calculations.

• To calculate gravitational force.

How does relativistic momentum differ from classical momentum?

• It excludes mass.

• It is always less.

• It is always greater.

• It includes the Lorentz factor.

What are the two components of total energy in relativistic physics?

• Potential and kinetic energy.

• Thermal and kinetic energy.

• Nuclear and kinetic energy.

• Rest and kinetic energy.

What happens to the rest energy equation when a particle is not moving?

• It becomes zero.

• It becomes negative.

• It equals mc^2.

• It doubles.

What is the rest energy of an electron in joules?

• 8.2 x 10^-14 J

• 9.1 x 10^-31 J

• 1.6 x 10^-19 J

• 3.0 x 10^8 J

How is an electron volt defined?

• The energy of an electron moving at the speed of light.

• The energy of an electron at rest.

• The energy of an electron accelerated through a 1V potential.

• The energy of an electron in a magnetic field.