Light is travelling from Ruby stone to air. The critical angle of ruby stone is 35°. Its refractive index is approximately equal to
Select one:
a. 1.33
b. 1.74
C. 1.52

Anton because carbon dioxide and water are used with light energy to produce glucose sugar and oxygen gas.

They coasters are in tear-drop form because of physics. if the ride was in a complete circle, how would the coaster get into the loop, let alone get out of the loop? also, the reason why most coasters are in tear-drop form is because of acceleration. the steeper the turn, the faster the ride.