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Get Full Access to University Physics, Volume 3 - 17 Edition - Chapter 3 - Problem 42
Get Full Access to University Physics, Volume 3 - 17 Edition - Chapter 3 - Problem 42

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ISBN: 9781938168185 2032

## Solution for problem 42 Chapter 3

University Physics, Volume 3 | 17th Edition

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University Physics, Volume 3 | 17th Edition

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Problem 42

Interference in Thin Films

Find the minimum thickness of a soap bubble that appears red when illuminated by white light perpendicular to its surface. Take the wavelength to be 680 nm, and assume the same index of refraction as water.

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Astronomy Week 9 As wavelength increases, frequency decreases (inverse relationship) Light­ electromagnetic radiation (energy traveling) Emission­ matter releases energy as light Absorption­ matter takes energy from light Transmission­ light passes through matter Reflection/scattering­ matter redirects light in many directions Reflection­ light redirected in one direction only White light­ all 7 colors Light is a particle and a wave Frequency, wavelength, and amplitude Photons­ little bundles of energy Speed of light= 3 * 10 m/s Speed= c, frequency= f, wavelength= λ, f * λ = c, λ = c/f, f = c/ λ Each photon has an energy proportional to its frequency ROYGBIV­ red, orange, yellow, green, blue, indigo, and violet Radio waves­ longest wavelength, cm to km Microwaves­ 1cm to 1mm (cold objects) Infrared­ 750nm to 1mm (warm objects) Visible­ 359­750nm (hot objects) Ultraviolet­ 10­400 nm (hottest stars) X­rays­ 10 to 10 nm (extremely hot) Gamma­rays­ shortest wavelength Continuous spectrum­ thermal emissions Emission line spectrum­ thin hot gas Absorption line spectrum­ thin gas in front of a thermal source Electrons occupy quantized energy levels Larger the energy jump, the shorter the wavelength Ionization­ electron is stripped from the atom Fluorescence­ atom is pumped by high energy photon to a higher level, electron then cascades downward in enough energy to release photons

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