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what type of image is formed when an object is placed at a distance of 1.5 focal lengths from a convex mirror​

Sagot :

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.