Which type of electromagnetic radiation has the highest frequency and energy?

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Explore Alberta's Grade 8 Science curriculum on Light and Optical Systems. Test your knowledge with engaging quizzes including flashcards and multiple choice questions. Prepare effectively for your exam!

Multiple Choice

Which type of electromagnetic radiation has the highest frequency and energy?

Explanation:
Photons carry energy that scales with frequency. Since energy per photon equals Planck’s constant times frequency, higher frequency means higher energy. In the electromagnetic spectrum, frequency increases as wavelength decreases. Among the options, gamma rays have the shortest wavelength, so they have the highest frequency and thus the highest energy per photon. Infrared has the lowest frequency and energy, ultraviolet is higher, and X-rays are higher still, but gamma rays top them all.

Photons carry energy that scales with frequency. Since energy per photon equals Planck’s constant times frequency, higher frequency means higher energy. In the electromagnetic spectrum, frequency increases as wavelength decreases. Among the options, gamma rays have the shortest wavelength, so they have the highest frequency and thus the highest energy per photon. Infrared has the lowest frequency and energy, ultraviolet is higher, and X-rays are higher still, but gamma rays top them all.

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