4) Clocks, which moves with the velocities comparable with the velocity of light, run:
(a) fast
(b) slow
(c) equal to the velocity of light
(d) with zero velocity
5) Max Planck received the noble prize in Physics in 1918 for his discovery of:
(a) electron
(b) energy quanta
(c) photon
(d) positron
6) Bronze medal is made up of metals:
(a) (copper, nickel)
(b) (copper, tin)
(c) (copper, silver)
(d) (copper, zinc)