A ray in flint glass (n = 1.61) reaches a boundary with glycerol (n = 1.47) at 68.9 deg. Does it reflect internally or refract into the air?
(pick reflect or refract)

b

explanation:

bc its just b

  distance on the y-axis and time on the x-axis.

explanation:

the instantaneous velocity = change in position/time taken

the slope of the graph should give instantaneous velocity.

  slope of a graph = change in value of y -axis / change in values of x -axis

  comparing both the equations

    change in value of y -axis = change in position

  change in values of x -axis = time taken

so position values should be on the y axis and time values should be on the x axis.

distance on the y-axis and time on the x-axis.