#" If there was not the convex mirror, the image of point A (-50.0) would be at point D (75,0)."#
#f:"focus"#
#u:"distance object and mirror or lens"#
#u':"distance image and mirror or lens"#
#1/f=1/u+1/(u')#
#1/30=1/50+1/(u')#
#1/(u')=1/30-1/50#
#1/(u')=(5-3)/150#
#1/(u')=2/150#
#u'=75#
#"The image at point D (75,0) behaves like a virtual object for the convex mirror."#
#"If the axes of the thin-edge lens and the convex mirror coincided, the image of point D (75,0) would be at O (0,0). "#
#-1/f=-1/u+1/(u')#
#-1/50=-1/25+1/(u')#
#1/(u')=-1/50+1/25#
#1/u'=(-1+2)/50#
#u'=50#
#" The Point O (0,0) also rotates 30 degrees when the spherical mirror rotates 30 degrees."#
#" We should rotate the point O(0,0) as 30 degrees."#
#Delta x=50*cos 30=(50*sqrt3)/2=25sqrt 3#
#Delta y=50*sin 30=50*0.5=25#
#"Coordinates of image of A(-50,0) is " (50-25sqrt 3,25)#
