Why magnification of concave mirror is negative?

Magnification is negative in a concave mirror. The magnification of a concave mirror is given by the ratio of the height of the image to the height of the object. Hence, if the image is inverted and real the magnification will be negative.

Why magnification of concave mirror is positive?

According to the new Cartesian sign conventions, magnification for a convex mirror is positive because image formed by a convex mirror is always virtual and erect. A concave mirror can form virtual or erect images and also real, inverted images. In the latter case, its magnification becomes negative.

In which case magnification of concave mirror is negative?

In case of concave mirror when object is placed at the center of curvature, magnification is -1. The negative sign shows that image is inverted.

Why magnification of mirror is negative for real images?

Magnification is the ratio between the height of the object and the height of the image. In the case of a real image, the height of the object carries a positive sign while the height of the image carries a negative one. Hence the magnification is negative.

Is magnification of convex mirror negative?

Magnification of a convex mirror is always positive , but that of a concave mirror may be both positive or negative . This magnification can tell us about the nature of the image based on the sign itself. If the ratio is negative then the image is real and inverted.

Is magnification of concave lens negative?

Concave lenses always form virtual images, so magnification produced by a concave lens is always positive. A concave lens always forms the image smaller than the object, so |m|<1.

When magnification is positive and negative?

When the image formed is virtual and erect, magnification is positive. And, when the image formed is real and inverted, magnification is negative.

Why is the magnification negative?

Magnification is negative in a concave mirror. The magnification of a concave mirror is given by the ratio of the height of the image to the height of the object. Hence, if the image is inverted and real the magnification will be negative.

What does it mean if the magnification is negative?

The negative magnification infers the image is real and inverted, and similarly, the positive magnification indicates virtual and erect. Magnification is used to represent the size of the image formed.

What is magnification of concave mirror?

The magnification m is given by m=−vu. According to sign conventions, for a concave mirror, the focal length (f) is negative, the object distance (u) is negative, the image distance (v) is positive for a virtual image and negative for a real image.

When magnification of concave mirror is less than 1?

Note: In a concave mirror, when the distance of the object is less than the focal length, the magnification will be greater than one. When the distance of the object is greater than the focal length, then the magnification is less than one.

Can a concave mirror be 1 magnification?

Concave mirror can produce image of magnification -1 and convex mirror always made diminished image so its magnification is always less than 1 and plane mirror always produce image of same size so it will produce image if magnification of 1. Was this answer helpful?