Understand that all types of electromagnetic waves move at the same high speed in a vacuum and nearly the same speed in air.

Quick explanation

Understand that all types of electromagnetic waves move at the same high speed in a vacuum and nearly the same speed in air

• This point belongs to Electromagnetic spectrum, especially Electromagnetic spectrum outcomes.
• You need to be able to understand that all types of electromagnetic waves move at the same high speed in a vacuum and nearly the same speed in air.
• The key ideas to know are Explain and State.
• Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.