Alice holds a flashlight motionless in her frame of reference. She shines it toward Bob, whom she measures to be approaching her at a speed of 0.9c, where c is the speed of light in vacuum. She measures the speed of the light leaving the flashlight to be c in her reference frame. Bob sees the light from Alice's flashlight and measures its speed. What speed does Bob measure for the light in his reference frame

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.