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CBSE Class 11-science Answered

explain Gross Error.?,What is Spectroscopic Method,Keplers Method and Copernicus Method
Asked by mehreennisar | 31 Jan, 2010, 08:18: PM
Expert Answer

Gross errors are undetected mistakes that cause a measurement to be very much farther from the mean measurement than other measurements.

The indirect methods of distance measurement.

Spectroscopic method: By measuring the Doppler shift in the spectrum of light received from a distant star, we can infer the distance of the star and it's recessional velocity from earth.

Kepler's Method: By using the Kepler's third law, we can measure the distance of a planet. We have to record it's time period to use this method, against a known time period and distance data for a planet.

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