ELI5: Explain Like I'm 5

Optics

Optics is the study of light. Optics looks at how light works and changes, and how we can use light and objects to help us see better. For example, lenses and mirrors are used to bend light in order to help us see images more sharply. We use sunglasses to filter out light and special glasses to help people with bad vision. Optics also helps us create things like lasers, projectors, and night vision goggles. Light is really important for us to see things!
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