- 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
L7-14. Optical Board - Reflecting Telescope
Purpose
To illustrate rays in one type of reflecting telescope
Equipment
Optical board with convex lens, long focal length concave mirror, and small plane mirror.◙
Images
Description
Use a single positive lens to obtain parallel rays, creating a source (stars) at infinity. The long focal length concave mirror is used as the telescope mirror. Before the focal point of the concave mirror, a small plane mirror is inserted, shifting the focus to a point below the incoming light beam. The small mirror can actually be either plane, concave or convex, producing different types of reflecting telescopes, or it can be eliminated entirely, with the observer or film at the focus of the primary mirror.
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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
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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