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

Which lists the fundamental forces in order, from strongest to weakest? strong nuclear, weak nuclear, electromagnetic, gravitational strong nuclear, electromagnetic, weak nuclear, gravitational gravitational, weak nuclear, electromagnetic, strong nuclear electromagnetic, gravitational, strong nuclear, weak nuclear