iGCSE Physics - 6.2.3 The Universe SUPPLEMENT

This Powerpoint specifically uses the Cambridge iGCSE Syllabus and covers all criteria for – Unit 6.2.3 The Universe SUPPLEMENT

Know that microwave radiation of a specific frequency is observed at all points in space around us and is known as cosmic microwave background radiation (CMBR)

Explain that the CMBR was produced shortly after the Universe was formed and that this radiation has been expanded into the microwave region of the electromagnetic spectrum as the Universe expanded

Know that the speed v at which a galaxy is moving away from the Earth can be found from the change in wavelength of the galaxy’s starlight due to redshift

Know that the distance d of a far galaxy can be determined using the brightness of a supernova in that galaxy

Define the Hubble constant H
0 as the ratio of the speed at which the galaxy is moving away from the Earth to its distance from the Earth;

recall and use the equation
H
0 =
vd

Know that the current estimate for H
0 is
2.2 × 10–18 per second

Know that the equation
dv

1H
0
represents an estimate for the age of the Universe and that this is evidence for the idea that all the matter in the Universe was present at a single point

**Every Powerpoint includes learning objectives, a starter and plenary, suitable activities and review questions with mark scheme. We also provide a free pdf version of the file so it can easily be printed for students as a handout or uploaded to the school VLE system
**

Bring your Cambridge iGCSE Physics lessons to life with our expertly designed teaching resources! Each unit is tailored to the latest syllabus, offering ready-to-use lesson plans, engaging experiments, and visually clear notes that save hours of prep time. Whether you’re new to the course or refining your approach, The Science Shelf gives you everything you need to boost student understanding and exam success — all in one place.