Elementary Lessons in Light |
Contents
CHAP PAGE I INTRODUCTIONSHADOWS ETC II | 115 |
PHOTOMETRY | 123 |
VELOCITY OF LIGHT | 131 |
Copyright | |
7 other sections not shown
Common terms and phrases
angle of incidence angle of refraction beam of light beam of parallel called candle centre of curvature colours concave lens concave mirror conjugate focus converge convex lens convex mirror critical angle deviation direction disc distance draw edge equal equation EXPT falls Find the position focal length front gas-flame Hence hole illuminating power image and object image is formed image produced inches incident ray index of refraction lamp lantern lenses light diverge light is reflected light travels luminous point magnified measured moves normal object is placed observer looking opposite side optical centre paper path pencil perpendicular plane mirror plate point of incidence principal axis principal focus prism radius of curvature ray of light real image refracted ray relative sizes screen secondary axis secondary image seen shadow sizes of image slit source of light spectrum standard candle Suppose surface total reflection vertical virtual image