The figure depicts a simplistic optical fiber: a plastic core (n1 = 1.60) is surrounded by a plastic sheath (n2 = 1.50). A light ray is incident on one end of the fiber at angle 0. The rays is to undergo total internal reflection at point A, where it encounters the core- sheath boundary. (Thus there is no loss of light through that boundary.) What is the maximum value of e that allows total internal reflection at A? Number Units the absolute tolerance is +/-0.1

The figure depicts a simplistic optical fiber: a plastic core (n1 = 1.60) is surrounded by a plastic sheath (n2 = 1.50). A light ray is incident on one end of the fiber at angle 0. The rays is to undergo total internal reflection at point A, where it encounters the core- sheath boundary. (Thus there is no loss of light through that boundary.) What is the maximum value of e that allows total internal reflection at A? Number Units the absolute tolerance is +/-0.1