Which of the following is an example of refraction?

you are able to see yourself in a mirror.
you can hear a smoke alarm located in the hallway from your bedroom.
you try to pick up a shell in the water, but it isn't where it appears to be.
the speed of your car is determined using radar.

➷  Refraction is the idea of light bending when it moves from a medium of one density to a medium of another density

The correct option would be "You try to pick up a shell in the water, but it isn't where it appears to be."

This is because water and air have different densities which causes the light to refract and make the shell appear elsewhere.

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answer; how far out of place which the object finished relative to the starting location;