What are the wavelengths of the helium spectrum?

A matching absorption spectrum occurs when light passes through a material and is absorbed by its atoms. The 12 lines of the visible helium spectrum correspond to wavelengths of 388.8, 447.1, 471.3, 492.1, 501.5, 504.7, 587.5, 667.8, 686.7, 706.5, 728.1 and 781.3 nanometres (nm).

What is the wavelength of the strongest helium absorption line?

Absorption and Emission Lines in Real Stars

Why are the emission wavelengths for helium and hydrogen different?

Why are the emission wavelengths for helium and hydrogen different? Helium showed 7 emission lines: two red, yellow, two green, indigo, and violet. The difference in emission lines are caused by the fact that helium has more electrons than hydrogen does. Hydrogen has only 1 while helium has 2.

How are the spectral lines of helium excited?

At left is a helium spectral tube excited by means of a 5000 volt transformer. At the right of the image are the spectral lines through a 600 line/mm diffraction grating. Helium wavelengths (nm)

What are the spectral lines of mercury sodium?

Mercury Sodium At left is a helium spectral tube excited by means of a 5000 volt transformer. At the right of the image are the spectral lines through a 600 line/mm diffraction grating. Helium wavelengths (nm) 438.793 w 443.755 w 447.148 s 471.314 m 492.193 m 501.567 s 504.774 w 587.562 s 667.815 m s=strong, m=med, w=weak Helium energy levels

What is the emission spectrum of an element?

The emission spectrum of a chemical element or compound is the series of lines that represent the wavelengths of electromagnetic radiation emitted by that chemical element while the transition of an electron from a high energy level to a low energy level. 1. Overview and Key Difference 2. What is Hydrogen Emission Spectra