Answer:
1.775 is the answer
Explanation:
We can figure out the index of refraction of the sapphire by using the following equation n = c/v
n = index of refraction
c = speed of light in a vacuum
v = speed of light traveling in medium
Step 1 :
v = 1.69 × 10^8
c = 3 × 10^8
Step2: Substitute values
n = c/v -----> n = 3 × 10^8 / 1.69 × 10^8 = 3/1.69 = 1.775
Index of refraction of sapphire is 1.775