Toda Ex. Astrophysicists usually estimate the distance from a pulsar to the earth by observing the...

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Toda Ex. Astrophysicists usually estimate the distance from a pulsar to the earth by observing the dispersion of the radio-frequency (rf) pulses emitted from a pulsar as they pass through the interstellar medium. The medium consists of a plasma whose number density is N. You may ignore damping. CF Score Answere Skipped: (a) What is the refractive index n(@) of the interstellar medium where w is the angular frequency of a wave? Stats r (b) The pulsar usually emits a short pulse containing a broad range of frequencies. An astrophysicist detects a pulse in a receiver which is tuned to a narrow band dw about an adjustable central frequency w. He/She measures the time difference dt between the arrival of two components of the pulse, centered at frequencies o and + da), where da < w. Which component, w or a+ do, arrives first, and by how much, as a function of the earth-pulsar distance L? Toda Ex. Astrophysicists usually estimate the distance from a pulsar to the earth by observing the dispersion of the radio-frequency (rf) pulses emitted from a pulsar as they pass through the interstellar medium. The medium consists of a plasma whose number density is N. You may ignore damping. CF Score Answere Skipped: (a) What is the refractive index n(@) of the interstellar medium where w is the angular frequency of a wave? Stats r (b) The pulsar usually emits a short pulse containing a broad range of frequencies. An astrophysicist detects a pulse in a receiver which is tuned to a narrow band dw about an adjustable central frequency w. He/She measures the time difference dt between the arrival of two components of the pulse, centered at frequencies o and + da), where da < w. Which component, w or a+ do, arrives first, and by how much, as a function of the earth-pulsar distance L?