Question

magnification of mirror is -1 what type of mirror is it what is the position of object and image give the nature of image

Answer 1

Hi ...dear...
here is your answer...
.
Magnification is -1
formula of magnification is = height of image / height of object = -1

The mirror must be a spherical mirror (concave mirror) as the magnification in plane mirror is never -1 but always 1. Also convex mirror always produces images smaller than the size of the object so it's magnification is always less than 1.
Hence it is a concave mirror.

Hence the image must be of the same size as that of the object.

Since the image size = object size
So the object must have been kept at the centre of curvature of the spherical mirror.

Since the magnification is negative, the image is real , inverted and can be obtained on the screen)hope this helped you....!!!!!

Answer 2

• The magnification of a mirror is -1. Hence, the image formed is real and inverted.

• This can be deduced from the formula, m= $\frac{h_{2} }{h_{1} }$  While considering image formation, $h_{1}$ is always positive. So, this gives us $h_{2}$ as negative. Hence, the image is real and inverted.

• Now, the mirror which forms a real image is a concave mirror. So, the mirror is concave, the object is placed on the left-hand side of the mirror and so is the image obtained.

• Therefore, we can conclude that the image is real, inverted and of the same size as the object as the magnitude of magnification is 1.

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