Link to our latest notes and resources: https://drive.google.com/drive/u/2/folders/15FnZdp3NJ15WmXnkrSWgi5ltd5rUI9Bg 25 Astronomy and cosmology 25.1 Standard candles Candidates should be able to: 1 understand the term luminosity as the total power of radiation emitted by a star 2 recall and use the inverse square law for radiant flux intensity F in terms of the luminosity L of the source F = L/(4πd2 ) 3 understand that an object of known luminosity is called a standard candle 4 understand the use of standard candles to determine distances to galaxies 25.2 Stellar radii Candidates should be able to: 1 recall and use Wien’s displacement law λmax ∝ 1/T to estimate the peak surface temperature of a star 2 use the Stefan–Boltzmann law L = 4πσr 2 T4 3 use Wien’s displacement law and the Stefan–Boltzmann law to estimate the radius of a star 25.3 Hubble’s law and the Big Bang theory Candidates should be able to: 1 understand that the lines in the emission and absorption spectra from distant

@tufathiam364Jul 2, 2026

la meuf de tiktokJul 2, 2026

ibrahimbathily2020Jul 2, 2026

Abi Nas❤️❤️Jul 2, 2026

the._.B O N D._.007Jul 2, 2026

A2 Level Astronomy and Cosmology

You Might Also Like

10th Class Physics New Book 2026

10th Class Physics Chapter 1 - Class 10 Physics Chapter 10 - Physics Class 10 Chapter 1

Question - Answers

10th Class Physics Chapter 11 - Class 10 Physics Chapter 1 - Physics Class 10 Chapter 11

Grade 3 English

Grade 2 English

Grade 4 English

Grade 5 English

SS 2 Physics

12 Class Physics Chapter 21

Class 11 Punjab physics Textbook

SSS11 Physical

SSS10 Physical

9th Physics Revision Class

SS 3 Physics

Acido - Basique

🔵 2nde - Corps purs et mélanges

12th Class Physics Chapter 16

Electromagnetism : Power of Magnets - Physics (Urdu/Hindi)

10th Class Physics Chapter 9 - Atomic and Nuclear Physics - Class 10th Physics Chapter 18 - Physics Class 10th Chapter 9

Deformation in Solids

11th Class Physics Chapter 1 - New Book 2025

FBISE Physics

Matric part 1 Physics,Introduction to Physics -9th class Urdu Lecture

Featured Picks

Gamixo

VSKIT Drama