Ray diagrams for an astronomical telescope

Click For Summary
SUMMARY

The discussion focuses on constructing ray diagrams for an astronomical telescope utilizing two convex lenses with specific focal lengths: 40 cm for the objective lens and 10 cm for the eyepiece lens. The scenarios analyzed include distances between the lenses of 50 cm, greater than 50 cm, and between 40 cm and 50 cm. Key conclusions indicate that the objective lens forms a real image, which serves as the object for the eyepiece, allowing for the creation of parallel rays directed towards the observer's retina.

PREREQUISITES
  • Understanding of convex lens optics
  • Knowledge of focal lengths and image formation
  • Familiarity with ray diagram construction techniques
  • Basic principles of telescopic systems
NEXT STEPS
  • Study the principles of ray tracing in optics
  • Learn about the construction and functioning of astronomical telescopes
  • Explore the effects of varying distances between lenses on image formation
  • Investigate the role of eyepiece lenses in magnification
USEFUL FOR

Students studying optics, physics educators, and amateur astronomers interested in understanding telescope design and image formation techniques.

[KNIGHT]
Messages
18
Reaction score
0

Homework Statement


An astronomical telescope is constructed using 2 convex lenses. The objective lens is of focal length 40cm and eyepiece lens is of focal length 10cm. Let d be the distance between the 2 lenses. Draw ray diagrams for the following situations.
1.When d=50cm
2.When d>50cm
3.When 40cm<d<50cm
The telescope is used to observe objects at infinity.

Homework Equations





The Attempt at a Solution


In each situation I drew the objective lens's incident ray and the refracted ray up to its focal plane. But i do not understand how to complete them.
raydiagrams_zps05303d3a.jpe
 
Physics news on Phys.org
The objective lens creates an image (what kind?) where? So the eyepiece should be positioned where to create parallel rays for the eye to focus on its retina?
 
The image from the objective lens will be the object for the eyepiece. Using this object, draw the rays to form the image from the eyepiece.
 

Similar threads

  • · Replies 7 ·
Replies
7
Views
2K
  • · Replies 2 ·
Replies
2
Views
2K
  • · Replies 5 ·
Replies
5
Views
2K
Replies
3
Views
2K
  • · Replies 2 ·
Replies
2
Views
5K
  • · Replies 12 ·
Replies
12
Views
3K
Replies
1
Views
2K
  • · Replies 4 ·
Replies
4
Views
4K
Replies
1
Views
2K
  • · Replies 1 ·
Replies
1
Views
1K