![](https://www.hoddereducationmagazines.com/wp-content/uploads/sites/5/2022/07/import/physics_review_2022_04_01-imagesimg4_1_jpg-a73c581ba46f4361597bb93cdb3979c3.jpg)
The terms in bold link to topics in the AQA, Edexcel, OCR, WJEC and CCEA A-level specifications, as well as the IB, Pre-U and SQA exam specifications.
Observations in the radio region of the electromagnetic spectrum involve photons originating in interstellar molecular clouds.
Your organisation does not have access to this article.
Sign up today to give your students the edge they need to achieve their best grades with subject expertise
Subscribe