1. when two forces applied on an object are equal and opposite, then these forces a) May move the object b) May stop the moving object
c) may move the object and cause a change in its shape
d) do not move the object but may cause a change in its shape.

Which statement is true if the refractive index of medium a is greater than that of medium b? a. total internal reflection is possible when light travels from air to medium b to medium a. b. total internal reflection is possible when light travels from medium a to medium b. c. total internal reflection is possible when light travels from medium b to medium a. d. total internal reflection is possible when light travels from air to medium a. e. total internal reflection is possible when light travels from air to medium b.