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Answer:
According to the question:
Focal length, f=−1.5 m (Since it is a concave mirror)
Object distance, u=−40 cm=−0.4 m (Since 1 m=100 cm)
Explanation:
By mirror formula:
v1+u1=f1[4pt]
⇒v1+−0.4 m1=−1.5 m1[4pt]
⇒v1=0.4 m1−1.5 m1[4pt]
⇒v1=4 m10−15 m10[4pt]
⇒v1=2 m5−3 m2[4pt]
⇒v1=6 m15−4[4pt]
⇒v1=6 m11[4pt]
⇒v=0.5454 m=54.54 cm
Since v=54.54 cm which is positive, hence image is behind the mirror.
The image is formed at the distance of 54.54 cm behind the mirror and is virtual and erect.