Another important fact of gas spectroscopy is that a gases emission and absorption spectrum are the same. Gas spectroscopy has a number of uses, one of which is to determine the composition of stars. We can't go to neighboring stars and take a sample of the gases inside, so instead we can measure what wavelengths are absorbed when the light emitted from the star pass through the far cooler gases surrounding it and approximate the star's composition. 1: If we measure this absorption spectrum from a nearby star:

And here is a chart of absorption bands:

Select all that apply:
Hydrogen
Helium
Sodium
Lithium

spectral lines lyman is one set

0.19 m/s and 0.45 m/s

-first use of geothermal energy occurred more than 10,000 years ago in north america by american paleo-indians

-the first industrial use of geothermal energy began near pisa, italy in late 18th century

-in 1904, italian scientist piero ginori conti invented the first geothermal electric power plant in which steam was used to generate the power

-with the above experiment, the first geothermal plant in usa started in 1922 with a capacity of 250 kilowatts

-however, in 1946 first ground-source geothermal heat pump installed at commonwealth building in portland, oregon

-during the 1960’s, pacific gas and electric began operation of first large scale geothermal power plant in san francisco, producing 11 megawatts

-in 1973, when oil crisis began many countries began looking for renewable energy sources and by 1980’s geothermal heat pumps (ghp) started gaining popularity in order to reduce heating and cooling costs

-as effect of climate change started showing results, governments of various countries joined hands to fight against it, for which kyoto protocol was signed in japan in 1997, laid out emission targets for rich countries and required that they transfer funds and technology to developing countries, 184 countries have ratified it

hope this