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# Mid2Eqs - Physics 135-3 Midterm II Eq Sheet Spring 2006...

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Physics 135-3 Midterm II Eq. Sheet Spring 2006 Physical Constants : Speed of Light in Vacuum : c = 3.0 × 10 8 m/s Conversions : 1 meter = 100 cm = 1000 mm = 10 6 : m = = 10 9 nm = 10 -3 km 1 mi = 5280 ft = 1609 m Ch. 35 Equations : λ λ n n = OR ( m = 0, 1, 2, ...) (2 or more slits) d m sin θ λ = d m sin ( ) θ λ = + 1 2 OR ( m = 0, 1, 2, ...) (thin film) 2 1 2 2 L m n = + ( ) λ 2 2 L m n = λ Ch. 36 Equations : 8 f = c (single slit minima) a m m sin ( , , ,...) θ λ = = 1 2 3 (circular aperture - first minimum) sin . θ λ = 122 d (Rayleigh’s criterion) θ λ R d = 122 . (multiple slits - half-widths) Δ θ λ θ hw Nd = cos (grating - dispersion) D m d = = Δ Δ θ λ θ cos (grating - resolution) R Nm avg = = λ λ Δ over for more equations

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