v is the velocity of the earth in its orbit, R the radius of earth’s orbit, and δ the sun’s declination.
If A = 10 × 10 kilometres,
v/V = 10–4, R = 1.5 × l011, λ=5 × 10–7, sin φ = 0.7, cos δ = 1, then Δ = 0.37.
To obtain this displacement would require a circuit 40 kilometres in length.
