[填空题]
(a) A 2.00-cm-high idl)y x6 isn9wnz7r/gi3, zb f4nsect is 1.20 mrnsgpuh25 t(( emr6 e8 from a 135-mm-focal-length lens. Where is the image, how high is it, r6e (2tpg(5um nrseh8 and what type is it?
$d_i$ = mm (real,behind the lens) $h_1$ = cm (inverted)
(b) What if $f=-135\mathrm{~mm}$?
$d_i$ = mm (virtual,in front of the lens)
$h_1$ = cm (upright)
