The reason for which the Belmar line spectra is strong in medium temperature star and weak in hot and cool star. The kind of star that sun is on the Balmer thermometer.

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Many of the bright stars in the night sky are highly luminous normal blue stars (such as Acrux), and others are blue giants (such as Rigel) or red giants (such as Betelgeuse). Generally, such stars have a luminosity of 103 to 105 times that of our Sun! Ignoring any effects from our atmosphere, how bright would a star with a luminosity of 8380 solar luminosities be if it were located 620 light years from Earth? (You will need to convert some values.) W/m² For comparison, if you were 1 meter from a regular 100 W light bulb, the brightness would be 7.96 W/ m². (Since stars are not this bright, your answer should be considerably less!) Kind of amazing you can see these things, isn't it?

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Chapter 9, Problem 8RQ

To determine

The reason for which the Belmar line spectra is strong in medium temperature star and weak in hot and cool star.

The kind of star that sun is on the Balmer thermometer.

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