A voyage in space; a course of six lectures "adapted to a juvenile auditory" delivered at the Royal Institution at Xmas 1913 (1915)
Turner, Herbert Hall, 1861-1930 · London Society for Promoting Christian Knowledge · leaf 238
dge; of course we use red light in order toshow them up. The general plan is simply this :if we pass the Suns light through a glass prismwe have seen that it is spread out into all thedifferent colours. Now let us block out all theother colours except the special red we want; for THE SUN 217 this… … The Red Flames round the edge of the Sun.(The whole of the ordinary Sun is blocked out.) be red; we can alter the place of the slit so as touse any other colour we please, which is lucky,because red is not at all a good colour for photo-graphy. You probably know that you can havered light in the…
Astronomy -- Juvenile literature
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
