Question 4 [1 point] State the acronym used to describe the colours making up white light. 'v Question 5 [1 point] Which medium from the list below is the MOST dense? 0 Ruby (n = 1.?5) 0 Water in = 1.33} 0 Air in = 1.0] 0 Glass in = 1.5} Question is [1 point} In which medium from the list below will light travel the fastest? 0 Diamond in = 2.42} 0 Water in = 1.33} 0 Ruby in = 135) 0 Glass in = 1.5)