13.2 Luminosity And Flux Flashcards
What is luminosity? What is it measured in ?
The total output power of a star .
It is measured in W - Watts
What is radiation flux?
What is it measured in?
The amount of energy reaching an area per second. It is measured in Wm^-2
What is radiation flux considered in day to day life?
It is the intensity of light
What equation do we often use to calculate mass change? What do we often replace E with and why?
E = mc^2
We often replace E with P(power), since it is the change in energy, which is the same as power.
What law is luminosity and radiation flux linked by ? What does it mean for the values.
Inverse square law.
It means as distance doubles the flux quarters.
What equation is luminosity and radiation flux linked by ?
F = L / 4(PI)d^2
What is the inverse square law?
? = k / ?^2
