Sethi

This page lists questions and answers that were posted by visitors named Sethi.

Questions

The following questions were asked by visitors named Sethi.

A line in star's spectrum lies at 400.0 nanometers. In the laboratory, that same line lies at 400.2 nanometers. How fast is the star moving along the line of sight; that is, what is its radial velocity? Is it moving toward or away from us? Since the wavel...
18 years ago

Answers

The following answers were posted by visitors named Sethi.