By M. Rousseau, J.P. Mathieu and D. ter Haar (Auth.)

ISBN-10: 0080169805

ISBN-13: 9780080169804

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6). F o r wavelength λ, the rings of order Κ a n d Κ— 1 are represented as solid lines. F o r the wavelength λ+άλ, the rings are represented as dotted lines. Consider a monochromatic wave λ. If Ay is the distance between two consecutive rings and by the width of the rings, one has <"> Ν is called the coefficient of fineness. Its v a l u e r \/R/(l —R) depends only on the reflection factor R of the F a b r y - P é r o t plates. If the source emits two close wavelengths λ and λ + d A , one says t h a t two points such as Mx and M[ are resolved if the distance M^M\ = dy is greater than by (Fig.

They are concave towards the blue. 4. Resolving power of the F a b r y - P é r o t . Wavelength λ. Orders Κ a n d Κ— 1. Let Ay be the distance between points M\ and M2 (Fig. 4). Expression (11) gives λ UAK= 1: /· λ κ Α ""FT e 1 Ay= βλ V = M2Ml y 2e (18) ' FIG. 9 . 6 T h e rings contract as one passes from the centre t o the periphery (Fig. 6). F o r wavelength λ, the rings of order Κ a n d Κ— 1 are represented as solid lines. F o r the wavelength λ+άλ, the rings are represented as dotted lines.

F o r what thickness R is it maximal? 30. 5. Indicate the advantages and disadvantages which occur for partially reflecting metal and dielectric films. 52 [PROBLEM 11 PROBLEMS IN OPTICS III In the case of normal incidence, equations (1) and (2) become r i J * \ \ ^ = - r μι V r (3) V μι Since ε = ε 0 ε Γ and μ = μ 0 μ Γ , if ετ = μ Γ, r = 0. 4). Realization of equation (3) at the surface of separation of two media is equivalent to the situation where the impedance is matched at the junction of two transmission lines.

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Problems in Optics by M. Rousseau, J.P. Mathieu and D. ter Haar (Auth.)


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