Figure shows a ray of light as it travels from medium a to medium b. the refractive index of medium b relative to medium a is ?

1.2247448714

Explanation:

Refractive index:

sin i / sin r

(sin 60) / (sin 45) = √6/2 = ‭1.2247448714

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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                                         : )