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  1. Hartridge. Phil. Mag., July, 1923.
  2. If d is the reduced diameter of the objective necessary to show diffraction rings, then this is the value to be used instead of a. For the utilization of such a diaphragm for measuring the “seeing” see Yearbook Carnegie Inst., p. 245, 1922.
  3. It may be noted that in the measurement of the standard meter in light-waves the order of accuracy in the relative values of the three radiations of cadmium vapor ∂λλ=5×10−7With λland Δλλboth of the order of 5 × 10−6the calculated value is 3 × 10−7.

1923 (1)

Hartridge. Phil. Mag., July, 1923.

Hartridge,

Hartridge. Phil. Mag., July, 1923.

Phil. Mag. (1)

Hartridge. Phil. Mag., July, 1923.

Other (2)

If d is the reduced diameter of the objective necessary to show diffraction rings, then this is the value to be used instead of a. For the utilization of such a diaphragm for measuring the “seeing” see Yearbook Carnegie Inst., p. 245, 1922.

It may be noted that in the measurement of the standard meter in light-waves the order of accuracy in the relative values of the three radiations of cadmium vapor ∂λλ=5×10−7With λland Δλλboth of the order of 5 × 10−6the calculated value is 3 × 10−7.

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β = b + c β
α = f 1 F ( b + c β ) , or α = f 1 F b + c α .
α = 0 . 002 .
α = 10 M + .005 α 0 ( α 0 = 1.22 λ a ) .
I = ( β 1 2 β 1 2 + θ 2 ) ( ( θ + ) 2 β 2 2 + ( θ + ) 2 )
I I 2 β 2 2 θ ( β 2 2 + θ 2 ) .
I I = 4 β 1 β 2 ( β 1 + β 2 )
= ρ 4 β 1 β 2 ( β 1 + β 2 )
α = ρ 4 α 1 α 2 ( a 1 + α 2 )
= f f 1 F b + c
= f 1 M b + c . ( M = μ sin 1 2 φ sin 1 2 ψ )
c a l c . = 0 μ .019
o b s . = 0 μ .020.
I = sin 2 2 π λ .
ω ω = .0035
β = b + c β
= f 1 β . φ = b f 1 φ + c r λ .
= .0025 r λ .
= 0 μ .0015 ,
= 0 μ .0002
= 0 μ .00004
α = / B
= 0 μ .003
α = 1 2 × 10 9 , or 1 10000 .
α = 4 millionths of a second .
α 0 = λ l
λ λ = b M + c ( λ l + Δ λ λ ) .
λ λ = 6 × 10 9
λ λ = 3 × 10 10