Graphic Organizer: Refractors and reflectors

Graphic Organizer:
Comparison of refractors and reflectors
Teacher PDF (685KB) As presented below
Student PDF (675KB) Pictures and blank chart
Refractors
Reflectors
Refractor Reflector
Contain a primary lens and an eyepiece lens Contain a primary mirror, usually a secondary mirror, and an eyepiece lens
The primary lens of a refracting telescope collects and concentrates light from distant objects The primary mirror of a reflecting telescope collects and concentrates light from distant objects
The image is formed through the process of refraction, the bending of light as it passes from one substance to another The image is formed through the process of reflection, light changing direction as a result of “bouncing off” a surface like a mirror
Parallel light rays are collected and refracted by the primary lens Parallel light rays are collected and reflected by the primary mirror
There is one basic design Have many designs, depending on the position and function of the secondary mirror
Chromatic aberration occurs in refraction because a lens bends different colors of light by different amounts Chromatic aberration does not occur; all colors of light reflect in the same way
Spherical aberration occurs when using lenses shaped like a sphere Spherical aberration occurs when using a mirror shaped like a sphere

Graphic Organizer: Refractors and reflectors