AQA GCSE Triple Science – Physics Practice Test

Unlock all questions

This demo includes only 20 questions. Upgrade to access hundreds of questions, flashcards, exam simulations, and disable ads.

Full question bankExam simulationsFlashcards
From $9.99Unlock all
Session length

1 / 20

Which EM waves have the longest wavelength and a common use?

X-rays; used for medical imaging

Visible light; used for photography

Infrared; used in night-vision

Radio waves; used for radio and television transmission

Longer wavelengths mean lower frequencies in electromagnetic waves, since c = fλ. Among these, radio waves have the longest wavelength, which makes them ideal for broadcasting information over large distances; their waves travel through the atmosphere and around obstacles, fitting well with radio and television transmission. The others have shorter wavelengths—X-rays are very short and high-energy, infrared is longer than visible light but shorter than radio and used for night-vision, and visible light sits in between and is used for photography.

Next Question
Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy