If a star with a radius of 600000km has a surface temperature of 6000K, calculate its luminosity
Use the formula Luminosity = (Surface temperature)^4Surface area Stefan's constantCalculate surface area with 4piradius^2Area=4.5210^18therefore luminosity= 4.5210^18 * (6000)^4 * 5.6710^-8luminosity = 3.3210^26 Watts
Related Physics A Level answers
All answers ▸Do heavier objects fall on the ground quicker?
What is the photoelectric effect and how does it provide evidence for the quantisation of electromagnetic radiation?
The mass of the Earth is 6.0x10^24 kg and its radius is 6.4x10^6m, calculate the orbital speed of the moon around the earth, the orbit of the moon is a circle of approximate radius of 60R where R is the radius of the earth and a mass m.
Why is Kinetic Energy mv^2/2?