1 The refractive index of a transparent material can be determined by measuring the critical angle when the solid is in air.  The cladding of an optical fibre has a refractive index equal to 1.45 and a core refractive index equal to 1.48. Calculate the critical angle of the fibre.
The star of âRidiculousnessâ and âRob Dyrdekâs Fantasy Factoryâ has married his sweetheart Bryiana Noelle Flores. Congratulations are in order for Rob Dyrdek, 41. The pro skateboarder and TV personality tied the knot with fiancee Bryiana Noelle Flores on Sept. 19.
Jimmie Van Zant has died: Cousin of Lynyrd Skynyrd's Ronnie Van Zant was 59. Jimmie Van Zant, cousin of Lynyrd Skynyrd's Ronnie Van Zant and a musician in his own right, has died. We know you're lookin' down on us from rock 'n' roll heaven, Jimmie, Lynyrd Skynyrd posted on Facebook Thursday. It is with a very heavy heart that we inform you that Jimmie Van Zant has passed away today holding his wife's hand.