- Sections
- A. General Materials & Mathematics
- B. Statics
- C. Kinematics & Dynamics
- D. Rotational Mechanics
- E. Gravitation & Astronomy
- F. Fluid Mechanics
- G. Vibrations & Mechanical Waves
- H. Sound
- I. Thermodynamics
- J. Electrostatics & Magnetostatics
- K. Electromagnetic Principles
- L. Geometrical Optics
- M. Wave Optics
- N. Spectra & Color
- O. Vision
- P. Modern Physics
L7-23. Astronomical Telescope - TV
Purpose
To illustratre how an astronomical telescope works.
Equipment
TV camera, 5cm and 20 cm focusing lenses on optical rail, and mounted object on separate optical rail, TV◙monitor not shown.
Images
Description
The TV camera functions as the eye, so what the eye sees can be viewed on a monitor or the rear projection screen. A 5 cm convex lens acts as the eyepiece and a 20 cm convex lens is the objective lens, with the TV camera focused at infinity (relaxed eye). The rule is positioned across the lecture hall (at infinity) from the telescope. The image is seen to be inverted and to have a magnification M=f(ob)/f(eye). The magnification can be checked by viewing a two-meter stick with the TV camera directly and then with the telescope. ◙◙To set up in practice, set the camera focus and lens positions an
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See pagesl1. light sources & light rays
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See pagesl2. plane mirrors
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See pagesl3. curved mirrors
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See pagesl4. refraction
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See pagesl5. total internal reflection
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See pagesl6. lenses
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See pagesl7. optical instruments
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See pagesl1. light sources & light rays
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See pagesl2. plane mirrors
-
See pagesl3. curved mirrors
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See pagesl4. refraction
-
See pagesl5. total internal reflection
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See pagesl6. lenses
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See pagesl7. optical instruments