<P> A reflecting telescope ( also called a reflector ) is a telescope that uses a single or a combination of curved mirrors that reflect light and form an image . The reflecting telescope was invented in the 17th century , by Isaac Newton , as an alternative to the refracting telescope which , at that time , was a design that suffered from severe chromatic aberration . Although reflecting telescopes produce other types of optical aberrations , it is a design that allows for very large diameter objectives . Almost all of the major telescopes used in astronomy research are reflectors . Reflecting telescopes come in many design variations and may employ extra optical elements to improve image quality or place the image in a mechanically advantageous position . Since reflecting telescopes use mirrors , the design is sometimes referred to as a `` catoptric '' telescope . </P>
<P> A reflecting telescope ( also called a reflector ) is a telescope that uses a single or a combination of curved mirrors that reflect light and form an image . The reflecting telescope was invented in the 17th century , by Isaac Newton , as an alternative to the refracting telescope which , at that time , was a design that suffered from severe chromatic aberration . Although reflecting telescopes produce other types of optical aberrations , it is a design that allows for very large diameter objectives . Almost all of the major telescopes used in astronomy research are reflectors . Reflecting telescopes come in many design variations and may employ extra optical elements to improve image quality or place the image in a mechanically advantageous position . Since reflecting telescopes use mirrors , the design is sometimes referred to as a `` catoptric '' telescope . </P>
what parts of a reflecting telescope form the image
what parts of a reflecting telescope form the image
curved mirrors
curved mirrors