In hydrogen, the transition from level 2 to level 1 has a rest wavelength of 121.6 nm.
(A) Find the speed and direction for a star in which this line appears at wavelength 120.6 nm.
(B) Find the speed and direction for a star in which this line appears at wavelength 121.4 nm.
(C) Find the speed and direction for a star in which this line appears at wavelength 122.2 nm.
(D) Find the speed direction for a star in which this line appears at wavelength 123.0 nm.
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Home » Physics » In hydrogen, the transition from level 2 to level 1 has a rest wavelength of 121.6 nm. (A) Find the speed and direction for a star in which this line appears at wavelength 120.6 nm.