What people are saying - Write a review
We haven't found any reviews in the usual places.
Light as a Tool
Storing LightThe Photographic Process
6 other sections not shown
Other editions - View all
achromatic angle angstroms angular aperture astigmatism astronomical atmosphere bright camera lens collimator collimator lens color errors coma correcting plate coude curve density depends designed developing agent Diam diameter diffraction disc dispersion distance electrons emulsion Equivalent Focal-length exposure eyepiece Fecker Figure film flexure focal plane focal surface focal-ratio glass grating Grubb Harvard Harvard College Observatory inches instrument length lenses light beam light intensity lines magnitude McMath-Hulbert Observatory measure millimeter motion mounting nebula objective prism Observatory observer obtain optical axis photoelectric cell photographic plate plate-holder polar axis position possible primary prime focus prism radial velocities rays reflecting telescope reflector refraction refractor region relative resolving power retina rotation Schmidt camera secondary sensitive simple lens slit solar spectra spectrograph spectroheliograph spectroscope spectrum speed spherical aberration star image starlight stellar telescope objective thickness transmitted tube-length ultra-violet visual telescope Warner & Swasey wave wave-front wave-length Zeiss