If magnification is +1.5 then what type of mirror is it
Answers
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Positive magnification indicates that the object is
- Erect
- Small
Hence, the is Convex mirror
In a convex mirror, for all positions the image formed is always small and erect
☑️The mirror used is Convex mirror ☑️
In a convex mirror the magnification is always between 0 and 1.
⇒ The mirror is concave and in concave mirror signs of v and u are different.
Image is behind the mirror. The image is virtual.Object is between the focus and the mirror. R= 60 cm.
⇒ The focal lengt30 cm and the sign of the focal length is negative.
⇒ The distance of the image is 1.5 times the distance of the object from the mirror and is at a maximum distance of 45 cm.
Answer: It is a concave mirror.
Magnification(M) can be determined as:
M = Image height/ Object height
Also, M = - v/u , where v= image distance and u is object distance.
As per convention, if the image formed is inverted then the height of the image will be negative.
Therefore, for magnification to be positive the height of the image needs to be positive , which means that the image formed is erect and also virtual.
This is possible only in case of a concave mirror in which the object is placed inside the focal length, thereby producing an enlarged, erect and virtual image behind the mirror.