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The image of the "infinitely-far-away" sun produced by a converging lens appears
Text Messaging
The act of sending short, digital messages, typically consisting of text, from one mobile device to another.
Instant Messaging
A form of communication over the internet that allows the exchange of text messages in real-time between two or more people.
A digital form of sending messages from one computer user to one or more recipients via a network.
Memos
Short for memoranda, these are brief written messages used within an organization to communicate information or instructions.
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