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The maximum angle will be 67°.
Solution:
= 0.0088 = 0.0147(1 - cos∅)
= 0.59 = (1 - cos∅)
= cos∅ = 1 - 0.59
= ∅ = cos⁻¹(0.4) = 67°
When the angle of incidence on water reaches a certain critical value the refracted ray lies along the boundary and the refraction angle is 90 degrees. This angle of incidence is known as the critical angle. This is the maximum angle of incidence at which refraction can occur.
The velocity of the incident particle before impact is parallel to the velocity of the center of gravity. Therefore, the maximum deflection angle is equal to the maximum angle between the velocity of the center of mass and the velocity of the incident particle after the collision as shown below.
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