Lighting Ratio difference in stops

Question 1

1:1

Answer 1

No difference

flat lighting

Question 2

2:1

Answer 2

1 stop difference

general color photography

Question 3

3:1

Answer 3

1 1/2 stop difference

general B&W photography

Question 4

4:1

Answer 4

2 stops difference

dynamic lighting low key

Question 5

8:1

Answer 5

4 stop difference
(very dynamic, low key)

Any detail in shadow?