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Question
Gamma rays and radio waves travel with the same velocity in free space. Distinguish between them in terms of their origin and the main application.
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Solution
| Gamma rays | Radio waves | |
| Origin: | Nuclear decay | Lightning |
| From the hottest and most energetic objects in the universe, such as neutron stars, pulsars, supernova explosions, and regions around black holes. | From broadcast radio towers, cell phones, and radars. | |
| Application: | It is used in radiotherapy, sterilisation, and disinfection. | It is used in fixed and mobile radio communication, radar and other navigation systems, communications satellites, and computer networks. |
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