How would our Sun's luminosity change if we increased its temperature 3 times?

The luminosity of our Sun could be derived by the Stefan-Boltzmann, otherwise known as Luminosity law. It says the total energy produced by a unit surface per unit time area (power per unit area) is: (power per unit area)=(Stefan-Boltzmann constant)(Temperature)4 That means the luminosity of the Sun is L=(Surface area of the Sun)(Stefan-Boltzmann constant)*(Temperature)4. We are only changing the temperature by a factor 3. That means the luminosity will increase by a factor of 34, since the temperature is present in the formula above with its fourth power. Therefore, the luminosity would increase 81 times.

Answered by Denislav G. Physics tutor

1927 Views

See similar Physics A Level tutors

Related Physics A Level answers

All answers ▸

2 resistors of resistances 150 ohms and 5000 ohms respectively are in series with each other. They both are also in parallel with a 1000 ohm resistor. What is the total resistance?


The friction coefficient of Formula 1 car tyres are around 1.7 in dry weather. Assuming sufficient power from the engine, calculate the theoretical best 0-100 km/h acceleration time in seconds. (neglect downforce, g=9.81m/s^2)


What is the difference between a vector and a scalar quantity?


A car undergoes uniform acceleration from a starting velocity of 10ms^-1 to 20ms^-1 in 10s. Assuming the car's mass is 2000kg, calculate the net force in the direction of the acceleration.


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences