# Stars/Yellows/Quiz

< Stars‎ | Yellows
Above, the northern section of the Eridanus constellation is delineated in green, while Orion is shown in blue. Below, an enlarged view of the region in the white box shows the location of Epsilon Eridani at the intersection of the two lines. Credit: ESO/Y. Beletsky.

Yellow stars is a lecture from the radiation astronomy department for possible inclusion in the course on the principles of radiation astronomy.

You are free to take this quiz based on yellow stars.

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## Quiz

1 Which of the following emission/absorption phenomena are associated with yellow stars?

 helium lines at 501 and 505 nm the strong C2 (1,2) band nitrogen emission in plasmas at 566.934 nm from N VIII helium emission line at 5876 Å neutral iron line at 526.96 nm calcium yellow line at 569.4 nm

2 Which of the following is a phenomenon associated with yellow stars?

 Jupiter sodium line emission sunspots on the Sun an emission with a wavelength of 420 nm phosphorus TiO

3 True or False, The red shift cannot affect yellow stars.

 TRUE FALSE

4 Complete the text:

 A filter of type F588N allows the transmission of rays.

5 Which of the following emission/absorption phenomena are associated with yellow stars?

 Nitrogen emission line at 575.5 nm the strong C2 (1,2) band nitrogen emission in plasmas at 566.934 nm from N VIII Helium emission line at 5876 Å neutral iron line at 526.96 nm Calcium yellow line at 569.4 nm

6 Which of the following is not a prominent feature associated with the yellowness response?

 M cone cells a green light source L cones "bluish green" 493-498 nm "yellowish green" 530-559 nm "yellow green" 559-570 nm

7 True or False, Bremsstrahlung radiation may be a source of the yellow continuum.

 TRUE FALSE

8 Which of the following are likely associated with a yellow emission line control group?

 rocky objects high peak to background plasma objects a G2V photosphere rotation watery surface spots

9 Using the equation ${\displaystyle {\frac {c2}{\lambda T}}{\frac {1}{e^{\frac {c2}{\lambda T}}-1}}e^{\frac {c2}{\lambda T}}-5=0}$ what temperature corresponds approximately to a Planckian peak wavelength of 580 nm?

 5140 K 5800 K 5170 K 6000 K 5870 K 5250 K

10 Which of the following are the differences between a star and an astronomical yellow source?

 a star may emit predominantly green rays an astronomical yellow source is spherical a yellow star is an astronomical yellow source a star with nuclear fusion in its chromosphere emits neutrinos, but a yellow source with no nuclear fusion ongoing does not a yellow source may be cloud like an astronomical yellow source may be a rocky object

## Hypotheses

1. Yellow stars allow the study all the astronomical objects of the Solar System.