A Cassegrain astronomical telescope uses two mirrors to form the image. The larger (concave) objective mirror has a focal length Æ’1 = +50.0 cm. A small convex secondary mirror is mounted 43.0 cm in front of the primary. As shown in FIGURE 27-31, light is reflected from the secondary through a hole in the center of the primary, thereby forming a real image 8.00 cm behind the primary mirror. What is the radius of curvature of the secondary mirror?
In figure 27-31

Transcribed Image Text:

Primary mirror Secondary mirror. Image 8.00 cm 43.0 cm-