What if magnification is positive in lens?

Magnification can be defined as the ratio of size of the image to the size of the object. If the ratio is positive then the image is virtual and erect.

Is magnification negative or positive?

Magnification of a convex mirror is always positive , but that of a concave mirror may be both positive or negative .

What is the magnification produced by a convex lens?

The image size formed by the convex lens may be less than, equal to or greater than the size of the object. Therefore, linear magnification produced by a convex lens can be less than 1, equal to or more than 1. So, the correct answer is option (D).

Which lens is it if the magnification is negative?

concave mirror
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.

Is magnification of convex lens negative?

A convex lens can form virtual as well as real images, so the magnification produced by a convex lens can be either positive or negative. Magnification is positive for virtual image and negative for real image. When |m|>1, the image is magnified. When |m|<1, the image is diminished.

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.

What does negative magnification mean?

inverted
A negative magnification indicates that the image is inverted. If the object is placed closer to a converging lens than the focal length, the rays on the far side of the lens diverge. The virtual image is upright and the magnification is positive in this case.

For which lens the magnification is always positive concave convex by concave by convex?

The concave lens and the convex mirror always produce a virtual image, therefore, their magnification is always positive whereas the convex lens and the concave mirror can produce real as well as the virtual image depending upon the object position, therefore, their magnification can be positive or negative. Answer- C.

Why magnification of convex mirror is positive?

The sign of magnification depend on the sign convention chosen. 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 which case magnification is positive?

(a) The magnification is positive for all virtual images and is negative for all real images. (b) The magnification of concave lens and convex mirror is always positive where as the magnification of convex lens and concave mirror can be positive or negative depending on the position of the object before the lens.

What happens when a convex lens is used as a magnifier?

However, when a convex lens is used as a magnifier (when the object distance is less than the focal length such as in the picture below) then the virtual image is upright and therefore has a positive magnification. Also note that the image distance below is considered negative, so the formula for magnification still holds where

When using a diverging lens the magnification will be positive?

When using a diverging lens or a magnifying glass on the other hand, the image is upright/erect/uninverted, so the magnification will be positive. What is the magnification of a convex lens when the image of an object is formed at its focal point?

Can convex lenses be used to produce a real image?

A convex lens can be used to produce a real image, and this occurs if the object is located at a position of more than one focal length from the lens. It is projected in front of the lens and can be captured on a screen.

What is linear magnification of a lens?

(B) Linear Magnification For Lens Definition: The ratio of the size of the image formed by refraction from the lens to the size of the object, is called linear magnification produced by the lens. It is represented by the symbol m. The size of an image formed by a lens varies with the position of the object.