What is the peak wavelength of an O star of temperature 50,000 K? What range of the spectrum is this?

Describe the plysical environment and processes to obtain the emission line spectra and absorption line spectra from the stars. Describe the physical environment and processes to obtain the emission line spectra and absorption line spectra from the stars. haha maintained a high

1. Spectral signatures can be described using luminosity values in different spectral regions. UV Blue Green Red NIR Forest 28 29 36 27 56 Water 22 23 19 13 8 Corn 53 58 59 60 71 Pasture 40 39 42 32 62 Assuming these signatures are influenced by atmospheric effects: is it possible to separate the different categories based on the values in this table? Which band (s) are the most useful for distinguishing between the different classes in this table and why?

Q3.2 The supergiant star has a surface temperature of about 2900 K and emits a power of approximately 4 x 1030 W. Assuming that is a perfect emitter and spherical, find its radius. (hint: Area of the sphere is A = 4πr²)