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# 5: Telescopes

## Learning Objectives

• Describe the principles of optics used in telescopes.
• Explain the differences between refracting and reflecting telescopes.
• Understand how radio telescopes work and how they are used.
• Explain uses of telescopes in space.
• Explain how other wavelengths, such as infrared, ultraviolet, x-rays, and gamma rays are used in astronomy.
• Explain other methods for studying the universe, such as gravity wave and neutrino detection.