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Optical Instruments

Optical Instruments The human eye is a remarkably effective organ, but its range can be extended in many ways by optical instruments such as eyeglasses, simple magnifying lenses, motion picture projectors, cameras (including TV cameras), microscopes, and tell-  ” scopes. Many such devices extend the scope of our vision beyond the visible range;satellite-borne infrared cameras and x-ray …

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Three Proofs

Three Proofs The Spherical Mirror Formula Figure 35-19 shows a point object 0 placed on the central axis of a concave spherical mirror. outside its center of curvature C. A ray from 0 that makes an angle a with the axis intersects the axis at / after reflection from the mirror at a. A ray that leaves o …

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Refracting Telescope

Refracting Telescope Telescopes come in a variety of forms. The form we describe here is the simple refracting telescope that consists of an objective and an eyepiece; both are representedin Fig. 35-18 with simple lenses. although in practice, as is also true for most  microscopes, each lens is actually a compound lens system.The lens arrangements for …

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Compound Microscope

Compound Microscope           Fig. 35-17 A thin-lens representation  of a compound microscope (not to scale).he objective produces a real image I of object 0just inside the focal point  F; of the eyepiece. Image I then acts as an object for the eyepiece, which produces a virtual final image I’ that  s seen by the …

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Optical Instruments

Optical Instruments The human eye is a remarkably effective organ, but its range can be extended in many ways by optical instruments such as eyeglasses, simple magnifying lenses, motion picture projectors, cameras (including TV cameras), microscopes, and  ” scopes. Many such devices extend the scope of our vision beyond the visible range satellite-borne infrared cameras and x-ray microscopes …

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Thin Lenses

Thin Lenses A lens is a transparent object with two refracting surfaces whose central axes coincide. The common central axis is the central axis of the lens. When a lens is  surrounded by air, light refracts from the air into the lens, crosses through the lens, and then refracts back into the air. Each refraction can …

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