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def definition def or abbrev

H_ShadowFringeObservable

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formal statement (Lean)

  90def H_ShadowFringeObservable (Rs dist res : ℝ) : Prop :=

proof body

Definition body.

  91  let theta_Rs := Rs / dist
  92  let f_fringe := 1 / (8 * tau0)
  93  -- The fringe is observable if the spatial wavelength exceeds resolution
  94  ∃ lambda_fringe : ℝ, lambda_fringe > 0 ∧
  95    -- Physical constraint: wavelength is related to fringe frequency and light travel time
  96    lambda_fringe = c_SI / f_fringe * theta_Rs
  97
  98/-- **THEOREM (RIGOROUS)**: Existence of a spatial wavelength.
  99
 100    This proves that a spatial wavelength CAN be defined for any finite tau0.
 101    Whether it exceeds the resolution is an empirical question. -/

depends on (20)

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