Question 1 proposed that light energy is radiated in discrete bundles with quantities directly related to the frequency of the light. Question 2 proposed that two events that are simultaneous in one inertial frame of reference are not necessarily simultaneous in another inertial frame of reference. Question 3 proposed that photons, even though they do not have mass, have proposed that if photons have wave properties, all moving momentum. Question 4 objects can have wave properties.

Question 1 proposed that light energy is radiated in discrete bundles with quantities directly related to the frequency of the light. Question 2 proposed that two events that are simultaneous in one inertial frame of reference are not necessarily simultaneous in another inertial frame of reference. Question 3 proposed that photons, even though they do not have mass, have proposed that if photons have wave properties, all moving momentum. Question 4 objects can have wave properties.