AST-061beginner

Refracting & Reflecting Telescopes: Foundations

Refracting telescopes use lenses to bend light to a focus, while reflecting telescopes use curved mirrors. Small refractors are robust and provide high-contrast views, while large research observatories use reflective designs to achieve large apertures and flexible instrument placement.

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Refracting & Reflecting Telescopes: Foundations

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AST-060Aperture, Focal Length & Resolution: Advanced Connections→

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AST-062Refracting & Reflecting Telescopes: Structures & Vocabulary→

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Refracting telescopes use lenses to bend light to a focus, while reflecting telescopes use curved mirrors.

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Refraction changes ray direction because light changes speed in glass, and different wavelengths refract by different amounts, causing chromatic aberration unless corrected.

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