QUESTION 9 A light ray propagates inside a transparent material having index-ofrefraction = 2.17. The ray is incident on the boundary between this material and water (having index-ofrefraction "water = 1.30). What is the smallest incident angle 6m (relative to the normal line to the interface) at which this light ray will be completely reected at the interface (in degrees (0))? Number TE = 3.14 QUESTION 10 The simplest nucleus, that of hydrogen, is a single proton. Next comes the nucleus of fH, the isotope of hydrogen with mass number 2, usually called deuterium. Its nucleus consists of a proton and a neutron bound together to form a particle called the deuteron, whose mass is 3.34456E-27 kg. What is the binding energy of the deuteron (in Joule)? (Use 6 sig. gs. for mass in calculations and answer a positive value for the binding energy with the scientic notation up to 3 sig. gs.) Physics constant: speed oflight c = 3.00E8 m/s mass ofproton = 1.67263E-27 kg mass of neutron = 1.67492E-27 kg