Question: For Which Position Of The Object Magnification Of Convex Lens Is Negative?

For which position of the object does a convex lens form a virtual and erect image?

When an object is placed between the focus and the optical centre of a convex lens, a virtual and erect image of the object is formed.

When the object is placed between the focus F1 and optical centre O: In this case, the image is formed on the same side as the object..

How many types of convex lens are there?

Types of Convex Lens On the basis, of the curvature of the two optical surfaces lenses are of two types biconvex and convex-concave. If the lens is biconvex or plano-convex, the lens is positive or converging. A lens is biconvex if both surfaces of the lens are convex.

What is convex lens formula?

f is the focal length. v is the distance of the image from the optical centre. u is the distance of the object from the optical centre. If the focal length is negative, it implies that the lens is concave (diverging), while if positive it implies that the lens is convex (converging lenses).

For which position of the object magnification of convex lens is minus one?

The magnification is negative. The image is inverted and therefore real. The size of the image is the same as that of the object. The distance of the object from the convex lens is twice the focal length.

Is magnification of concave lens negative?

Concave lens always forms virtual images, so, magnification produced by concave lens is always positive.

Is V negative in concave mirror?

And for image distance, V in lens it is taken as positive in Convex lens since image is formed on +X side. It is taken as negative in Concave lens since image is formed in -X side of the Cartesian. In Concave mirror V is taken as positive and negative for convex mirror.

Is magnification positive or negative?

Magnification: The ratio of the height of the image to the height of the object is called the magnification of the spherical mirror. The magnification of the actual image will always be negative and the virtual image should always be positive.

What happens when magnification is negative?

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.

At what distance should an object be placed?

Therefore the object must be placed at a distance of 72 cm from the focal length of the lens. And the magnification of the image formed will be inverted this could be seen by the negative sign obtained. And this sign indicates the position in respect to the coordinate where the focal length of the lens is placed.

Can a magnitude be negative?

Answer: Magnitude cannot be negative. It is the length of the vector which does not have a direction (positive or negative). … The zero vector (vector where all values are 0) has a magnitude of 0, but all other vectors have a positive magnitude.

In which lens magnification is negative?

Using the Gaussian form of the lens equation, a negative sign is used on the linear magnification equation as a reminder that all real images are inverted. If the image is virtual, the image distance will be negative, and the magnification will therefore be positive for the erect image.

For which position of the object does a convex lens?

Answer: We will obtain a virtual and erect image when the convex lens is placed between optic centre and focus.

Are real images always inverted?

Real images (images on the same side of the object) are always inverted. Virtual images (images on opposite side of an object) are always erect/ upright.

Why magnification of concave mirror is negative?

In a concave mirror, the magnification is the ratio of the height of the image to the height of the object. … Hence, if the image is real, the magnification is negative and if the image is virtual, the magnification is positive.

What is magnification formula?

The formula of magnification represents the ratio of the height of the image to the ratio of the height of the object. Furthermore, the letter ‘m’ denotes the magnification of the object. Besides, its formula is: Magnification (m) = h / h’ Here, h is the height of the object and h’ is the height of the object.

Why is an image inverted?

A convex lens makes objects look larger because it disperses light. When objects are magnified, they are within the focal length of the magnifying glass. … The image appears inverted and smaller when the light is focused at a point beyond the lens’s focal length.

Is concave lens?

A concave lens is a lens that possesses at least one surface that curves inwards. It is a diverging lens, meaning that it spreads out light rays that have been refracted through it. A concave lens is thinner at its centre than at its edges, and is used to correct short-sightedness (myopia).

Is V negative in convex lens?

For focal length, f in lens is always taken as negative for concave and positive for convex. … And for image distance, V in lens it is taken as positive in Convex lens since image is formed on +X side. It is taken as negative in Concave lens since image is formed in -X side of the Cartesian.

What is the magnification of convex lens?

Magnification of convex lens: It is a ratio between the image height and object height. A magnification of 2 indicates the image is twice the size of the object and a magnification of 1 indicates an image size being the same as the object size.

What is the nature of the image formed by a concave mirror?

Concave mirrors can produce both real and virtual images; they can be upright (if virtual) or inverted (if real); they can be behind the mirror (if virtual) or in front of the mirror (if real); they can also be enlarged, reduced, or the same size as object. 2.

Which lens is used for magnification?

convex lensA magnifying glass (called a hand lens in laboratory contexts) is a convex lens that is used to produce a magnified image of an object. The lens is usually mounted in a frame with a handle.