An optical fiber is made of clear plastic (n = 1.50). light travels through the fiber at angles ranging from 40° to 55°. what is the measurement of the critical angle of this fiber?
a. 42.3°
c. 41.8°
b. 44.6°
d. 47.7°

Amass attached to a spring is displaced from its equilibrium position by 5cm and released. the system then oscillates in simple harmonic motion with a period of 1s. if that same mass–spring system is displaced from equilibrium by 10cm instead, what will its period be in this case? a mass attached to a spring is displaced from its equilibrium position by and released. the system then oscillates in simple harmonic motion with a period of . if that same mass–spring system is displaced from equilibrium by instead, what will its period be in this case? a) 0.5sb) 2sc) 1sd) 1.4s