Focal length of concave mirror is 30 cm and object is 40 cm determine nature and position
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here,
u = -30cm
f = -20cm
by using mirror formula,
1/v + 1/u = 1/f
1/v + 1/-30 = 1/-20
v = -60 cm
negative sign indicates that image is in front of the mirror
therefore,
the distance between image and object = 60-30= 30cm
u = -30cm
f = -20cm
by using mirror formula,
1/v + 1/u = 1/f
1/v + 1/-30 = 1/-20
v = -60 cm
negative sign indicates that image is in front of the mirror
therefore,
the distance between image and object = 60-30= 30cm
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