QUESTION 8 Which of the following is not a property of a laser? O The light all has the same phase All of these are laser properties The light is one wavelength O The light is in one direction QUESTION 9 What property of light allows a laser beam to travel down an optical fiber? O Refraction O Interference O Coherence O Total internal reflection QUESTION 10 An additional rule for the allowed transitions in an absorption spectrum is = +1 O The transition must be to a s suborbital (10) O The transition must be to a p orbital (1=1) The transition can never be to a s suborbital