TELESCOPES Chapter 7 Lesson 1 WHAT ARE THE

TELESCOPES Chapter 7 Lesson 1

WHAT ARE THE REGIONS OF THE ELECTROMAGNETIC SPECTRUM • Electromagnetic radiation-energy that can travel through space in the form of waves • Visible light- the light you can see • Spectrum- white light that has been shined through a prism and creates a range of different colors according to their wavelengths

WHAT ARE TELESCOPES AND HOW DO THEY WORK? • Telescopes- instruments that collect and focus light and other forms of electromagnetic radiation • They make distant objects appear larger and brighter • Optical telescope- uses lenses or mirrors to collect and focus visible light • 2 types of optical telescopes • Refracting telescope- uses convex lenses to gather and focus light • Reflecting telescope- uses a curved mirror to focus light

Telescopes Refracting and Reflecting Telescopes A refracting telescope uses convex lenses to focus light. A reflecting telescope uses a curved mirror to focus light.

Telescopes Refracting and Reflecting Telescopes What are the similarities and differences between the two?

OTHER TELESCOPES • Observatory- building that contains one or more telescopes usually located at tops of mountain tops • Radio telescope- direct radio waves from objects in space • Use curved reflecting surfaces X-Ray Telescopes- usually located in space collect x-rays from very hot opjects in space

Telescopes Where do the Optical, Radio and X-ray telescopes work best?