Optical engineers need to know the cone of acceptance
of an optical fiber. This is the maximum angle that an entering
light ray can make with the axis of the fiber if it is to be guided
down the fiber.
What is the cone of acceptance of an optical fiber for which the
index of refraction of the core is 1.75 while that of the cladding
is 1.55? You can model the fiber as a cylinder with a flat entrance...
calculate the work done when: a) a 55 N force acting
at an angle of 28 degrees to the horizontal pushes an object 5m
horizontally. b) a spring of spring constant 45n/m is stretched by
32cm.