If the refractive index of a particular is 1.41, calculate the critical angle​

If C is critical angle, then

sinC=

n

1

, where n is refractive index of the material.

Now, n =

2

, therefore ,

sinC=

2

1

Then, C =45

∘

answer would be letter choice (a),   a ball resting on a shelf. would be another example of potential energy   >   stored energy > not moving.

a ball spinning on a finger   >   kinetic energy > moving energy

a ball rolling on the ground   >   kinetic energy   > moving energy

a   ball flying through the air   > kinetic energy   >   moving energy

hope that                                         : )

truck y has a greater velocity than truck x.