deflection

de|flec|tion /dɪfl'ekʃən/ (deflections)
1 [N-VAR]
The deflection of something means making it change direction. (TECHNICAL)
...the deflection of light as it passes through the slits in the grating.
2 [N-COUNT]
In sport, the deflection of a ball, kick, or shot is when the ball hits an object and then travels in a different direction.

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