A horizontal ray is reflected vertically upward by a smooth reflecting curve at a point P. Which statements are correct?

Select all that apply

• Option A

  The incident and reflected propagation directions are perpendicular.

• Option B

  The tangent at P has slope magnitude 1.

• Option C

  Only the local tangent/normal at P is needed to determine the reflected direction.

• Option D

  The complete global shape of the reflecting curve is required to apply the law of reflection at P.