Instruction Guide: Elementary Optics and Applications to Fire Control InstrumentsU.S. Government Printing Office, 1945 - 211 σελίδες |
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Σελίδα 7
... single electron and a photon before and after collision of these bodies . He found that both have kinetic energy and momentum and that they behave like material bodies . This was somewhat a return to the old corpuscular theory . j ...
... single electron and a photon before and after collision of these bodies . He found that both have kinetic energy and momentum and that they behave like material bodies . This was somewhat a return to the old corpuscular theory . j ...
Σελίδα 9
... Single rays of light do not exist . The term " light ray , " is used throughout this manual for the sake of clarity and convenience to indicate the direction of travel of light . C. In studying the diagrams , it must be remembered that ...
... Single rays of light do not exist . The term " light ray , " is used throughout this manual for the sake of clarity and convenience to indicate the direction of travel of light . C. In studying the diagrams , it must be remembered that ...
Σελίδα 11
... single ray of light will be reflected can be plotted by erecting a perpendicular or normal at the point of impact and applying the law of reflection ( fig . 18 ) . Any rough sur- face can be regarded as an infinite number of elementary ...
... single ray of light will be reflected can be plotted by erecting a perpendicular or normal at the point of impact and applying the law of reflection ( fig . 18 ) . Any rough sur- face can be regarded as an infinite number of elementary ...
Σελίδα 18
... single medium changes gradually as the light proceeds from point to point , the path of the light will also change gradually and will be curved rather than in a straight line . b . Although air at its densest has a refractive index of ...
... single medium changes gradually as the light proceeds from point to point , the path of the light will also change gradually and will be curved rather than in a straight line . b . Although air at its densest has a refractive index of ...
Σελίδα 20
... single point where they cross ( color and other aberrations are disregarded at this time ) . Such a lens may be thought of as consisting of an infinite number of prisms arranged so that each direct light rays to a single point . The ...
... single point where they cross ( color and other aberrations are disregarded at this time ) . Such a lens may be thought of as consisting of an infinite number of prisms arranged so that each direct light rays to a single point . The ...
Συχνά εμφανιζόμενοι όροι και φράσεις
ABBE PRISM achromatic adjustment Amici prism angle of incidence astigmatism axis azimuth binocular chromatic aberration Coated Optics collective lens color compound lens concave Construction Features convergent lens convex critical angle crown glass curvature deviation diopter divergent lens Elbow Telescope ERECTOR exit pupil eyepiece field of view Figure filters Fire Control Instruments flint glass focal length focal plane focal point focusing Glossary height finder horizontal incident ray index of refraction inverted lens erecting system lenses light rays line of sight magnification medium mils mirror mounted normal objective prism observer Optical Components Optical Diagram optical elements optical instrument optical system Panoramic Telescope parallel path of light penta prism periscope point of light PORRO PRISM prism erecting system Properties of Light RA PD range finder rays of light real image reflected ray reflecting surface Representative Fire Control reticle retina right angles spherical aberration stereoscopic target vision wave length yards
Δημοφιλή αποσπάσματα
Σελίδα 181 - When a ray of light passes from one medium to another, it is refracted so that the ratio of the sine of the angle of incidence to the sine of the angle of refraction is equal to the ratio of the velocities in the two media.
Σελίδα 6 - BY ORDER OF THE SECRETARY OF WAR: GC MARSHALL, Chief of Staff. OFFICIAL: JA ULIO, Major General, The Adjutant General.
Σελίδα 12 - ... which struck the water, that is to say the angle of reflection will be equal to the angle of incidence.
Σελίδα 188 - Usually a thin coating of silver or aluminum on glass constitutes the actual reflecting surface. When this surface is applied to the front face of the glass, the mirror is termed a front surface mirror.
Σελίδα 186 - The magnifying power of the telescope is equal to the quotient of the focal length of the objective divided by the focal length of the ocular.
Σελίδα 148 - Each degree is divided into 60 parts called minutes, and each minute into 60 parts called seconds.
Σελίδα 89 - A filter is usually of special glass, gelatin, or plastic optical parts with plane parallel surfaces that are placed in the path of light through the optical system of an instrument to selectively absorb certain wavelengths of light, reduce glare, or reduce light intensity. Colored, ultraviolet, neutral density, and polarizing filters are in common use. Filters may be separate elements or integral devices mounted so that they can be placed in or out of position in...
Σελίδα 16 - The plane which contains the incident and reflected rays and the normal to the surface is called the plane of incidence, the angle between the incident ray and the normal is the angle of incidence...
Σελίδα 182 - The index of refraction expressed in tables is the absolute index, that is, vacuum to substance at a certain temperature, with light of a certain wavelength. Examples, vacuum, 1.000; air, 1.000292; water, 1.333; ordinary crown glass, 1.516. Since the index of air is very close to that of vacuum, the two are often used interchangeably.
Σελίδα 181 - Descartes notices — and this seems to be the first step in the reduction — that "the determination of this [anaclastic] line depends on the relation between the angle of incidence and the angle of refraction