[填空题]
A luminous object 3.0 mm high is placed 20.0 cm fromrr7 u*nggs65z a co/da3h* h4dozw,fbj 0l nvex mirror of radius of curvatud 4lao0,h *hdz3wjb/ fre 20.0 cm.
(a) Show by ray tracing that the image is virtual, and estimate the image distance. cm
(b) Show that the (negative) image distance can be computed from Eq. 23–2 using a focal length of -10.0cm
(c) Compute the image size, using Eq. 23–3. mm
