One bright summer day a swimmer is floating with her head just above the surface of a large, clear lake where the water has index of refraction n = 1.43. She comes upon a tall wooden post emerging from the water. When she looks into the water at just the right angle she can see the bottom of the post, which is at a depth h = 5.50 m below the water's surface. As she floats away from the post, eventually she can no longer see the bottom of it. At what distance d from the post does this occur? (in m)

5.38035 m

Explanation:

= Refactive index of water = 1.43

h = Depth = 5.5 m

Critical angle is given by

d = horizontal distance from the post where she no longer see the bottom of wooden post

So,

The distance d is 5.38035 m

this is an example of "committed" time.

committed time, as contracted time, takes need over essential and available time since it is seen as profitable work. it alludes to the time allotted to keep up a home and family. at the point when a man is commuting using committed time this individual may feel that the drive is an obligation to family, for example, strolling youngsters to class or driving a mate to work. contracted and committed time clients may feel that their commute could really compare to the commute of important or leisure time clients on the grounds that their commute is profitable work. in this manner, they might be more disposed to pick a mechanized method of movement.