Luminosity & the Inverse-Square Law
This lesson is part of the course
In this lesson
You compute the Sun's power output from its size and temperature, the sunlight each planet receives and where other stars would warm a planet like the Sun warms Earth.
Buy the course once for $9.99 to unlock every lesson and lab, the final exam and the certificate – lifetime access, no subscription.
Lessons in this course
- Cosmic Units: AU, Light-Years & Parsecs Locked
- Kepler's Third Law: Periods, Orbits & a Log-Log Plot Locked
- Orbital Speed, Escape Velocity & Weighing the Sun Locked
- Parallax: Distances to the Nearest Stars Locked
- Apparent vs Absolute Magnitude & the Distance Modulus Locked
- Luminosity & the Inverse-Square Law Locked
- Wien's Law: Star Temperature, Colour & Spectral Class Locked
- Hubble's Law: Fitting H₀ & the Age Scale of the Universe Locked