Answer:
Refraction is what happens when light passes through some medium and changes it's direction because of it. For instance, when light travels through a lens light is bent as it goes from air to glass and back to air again. :)
Now, let's do the same as we did for the previous one here.

notice again, how did we get 84 for the 4th element's coefficient? well 36 * 7 / 3. and so on. And you can just expand it from there.
Answer:
2775
Step-by-step explanation:
Hope this helped :)
Theoretical because they haven’t tested it yet that is just their hypothesis
Answer:
0.5×2/2=1/2 is the required fraction.