When light passes from glass n=1.55 to water n=1.33 it ? a) continues in a straight line without bending
b) bends toward the normal to the boundary
c) bends away from the normal to the boundary
d) travels in a curved path after it crossed the boundary

Consider the growth of a 20-nm-diameter silicon nanowire onto a silicon wafer. the temperature of the wafer surface is maintained at 2400 k. assume the thermal conductivity of the silicon nanowire is 20 wm-1k-1 and all its surfaces including the tip are subjected to convection heat transfer with the coefficient h = 1×105 wm-2k-1 and t∞ = 8000 k. when the nanowire grows to l = 300 nm, what is the temperature of the nanowire tip (t (x =