84 The Sky 
case the order of the separation of colors is reversed, red 
being bent most, violet least. The spectrum due to diffrac- 
tion is the reverse of that due to dispersion. 
WHITE LIGHT 
SHARP EDGE COLORS SEPARATED 
DIFFRACTION 
Scattering of light occurs when a ray of light falls upon 
many small particles (such as dust particles in the air). After 
UNSCATTERED 
LIGHT 
oR iE © 
See: OSCAT- 
25 ~ TERED 
ESS. Lik 
eARTICUES 
SCAT TERING 
the impact of light upon the particles, it is reflected back in | 
all different directions in much the same way as water 
