a)
f = focal length = - 22 cm
ho = object height = 15 cm
hi = image height = ?
do = object distance = 20 cm
di = image distance = ?
using the mirror equation
1/di + 1/do = 1/f
1/di + 1/20 = 1/(-22)
di = - 10.5 cm
using the equation
hi/ho = - di/do
hi/15 = - (- 10.5)/20
hi = 7.875 cm
Imgae distance : 10.5 cm
Image height : 7.875 cm
Type of image : Virtual
Orientation : Upright
b)
f = focal length = - 22 cm
ho = object height = 15 cm
hi = image height = ?
do = object distance = 22 cm
di = image distance = ?
using the mirror equation
1/di + 1/do = 1/f
1/di + 1/22 = 1/(-22)
di = - 11 cm
using the equation
hi/ho = - di/do
hi/15 = - (- 11)/22
hi = 7.5 cm
Imgae distance : 11 cm
Image height : 7.5 cm
Type of image : Virtual
Orientation : Upright
c)
f = focal length = - 22 cm
ho = object height = 15 cm
hi = image height = ?
do = object distance = 100 cm
di = image distance = ?
using the mirror equation
1/di + 1/do = 1/f
1/di + 1/100 = 1/(-22)
di = - 18.03 cm
using the equation
hi/ho = - di/do
hi/15 = - (- 18.03)/22
hi = 12.3 cm
Imgae distance : 18.03 cm
Image height : 12.3 cm
Type of image : Virtual
Orientation : Upright
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