Problems: Light from stars

IB Physics: Problems: Light from stars

1. The photo below shows the constellation Orion. Bellatrix is the star on Orion"s left shoulder.The following data is copied from wikipediaDistance from Earth = 77PcRadius = 6RsunLuminosity = 6,400 LsunTemperature = 22,000KApparent magnitude = 1.64a. Show that the absolute magnitude of Bellatrix is -2.73b. Use Stefan Boltzmann Law and the radius to calculate the Luminosity. Compare this with the data.


To access the entire contents of this site, you need to log in or subscribe to it..

Click the free stuff button on the home page to access free pages or check the blog (which is also free).

All materials on this website are for the exclusive use of teachers and students at subscribing schools for the period of their subscription. Any unauthorised copying or posting of materials on other websites is an infringement of our copyright and could result in your account being blocked and legal action being taken against you.