Merchant, F. W. (Francis Walter), 1855-1937, Fessenden, Cortez, b. 1852 · Toronto : Copp, Clark · leaf 281
272 PHYSICAL SCIENCE. 6- Refraction of Light by a Prism Dispersion.Experiment 9. Through a narrow slit in a shutter admit a beam of sunlightinto a darkened room, and in the path of the beam place atriangular glass prism, of the form shown in Fig. 219, turningit around until the light passes through… … What changes in direction in the light takes place in passing intoand out of the prism ? Observe the continuous band of colours on the screen.This is called a spectrum. Observe how one colour shadesoff into the next, passing from red at one end to violet at theother, through all the gradations of…
Physics
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