The index of refraction of a glass rod is 1.48 atT = 20.0°C and varies linearly with temperature,with a coefficient of 2.50 x 10-5C⁰-1. Thecoefficient of linear expansion of the glass is5.00 x 10-6C⁰-1. At 20.0 °C the length of the rod is2.80 cm. A Michelson interferometer has this glassrod in one arm, and the rod is being heated so that itstemperature increases at a rate of 5.00 C°/min. Thelight source has wavelength λ = 569 nm, and the rodinitially is at T = 20.0°C.Part AHow many fringes cross the field of view each minute?ΔΝ =SubmitΤΙ ΑΣΦRequest Answer< Return to AssignmentProvide Feedback?fringes/minute

Given information: ng = 1.48T=20°Cα = 5×10-6∆T= 5°C/minλ = 569×10-9 mL0 = 2.80 cm

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