# What is the equation for convex lens?

## What is the equation for convex lens?

When the object AB is held close to the lens between O and F the image A’B’ formed by convex lens is virtual, erect and magnified. or, 1/f = 1/v + 1/u is the required equation.

How is the image formed in a convex lens?

The convex image forms a virtual and erect image only at one position. When the object is placed between the first focus, F1, and the optical center O of the lens, the image is formed on the same side as that of the object, and the image will be natural, virtual, and erect, and the relative size enlarged.

### What is F and 2F in convex lens?

Convex lens ā object between 2F and F From the above diagrams we can observe that all the images are located beyond two principal focal points (2F ) on the other side of the convex lens. All the images are larger than the object and can be much larger as they approach one principal focal length (F ).

What is the lens mirror equation?

f = R 2. 1 v + 1 u = 1 f. Calculation: To calculate the Focal length of the given mirror, substitute the value of Radius of Curvature (R) in. f = R 2.

#### What is 1 V 1 U 1 f?

The lens formula 1vā1u=1f is valid when medium on both sides of the lens is air.

How do you find the image distance of a convex lens?

Procedure

1. Place the convex lens on a lens holder, placing the screen on the other side of the lens.
2. Try focusing the image to get a sharp, clear and inverted image on the screen.
3. The position at which the lens is fixed, mark it as O.
4. Once the focal length is calculated, mark point F on both the sides of the lens.

## What do you mean by lens equation?

Lens equation or lens formula is an equation that relates the focal length, image distance, and object distance for a spherical mirror. It is given as, Lens Formula – 1/u + 1/v = 1/f. where. v = Distance of the image from the lens.

When an object is placed at 2F ā of a convex lens its image is formed?

An object placed at 2F of a convex lens will produce an image at 2F. As you can clearly see in the diagram that the image formed is real and inverted.

### Which type of image is formed by a convex lens?

– Image is virtual (behind the lens) – Image is erect – Image is larger than the object (Magnified)

What are the properties of an image formed by a convex lens?

The concave lens is known as the diverging lens because it diverges the rays after they pass through it , The image formed by the concave lens is a virtual image because it can not be received on a screen . Uses of the concave mirror and the convex mirror in our daily life. The types and uses of lenses in our life.

#### Does a convex lens form a virtual or real image?

No, convex lens can form both real and virtual images depending upon the position of object placed in front of lens. Convex lens can form a virtual image only when the object is placed in between the focus and optical centre of lens. The image formed in this case is always erect and enlarged and magnification is always greater than 1.

Can a concave lens ever form a real image?

Can a concave lens ever form a real image? Plane mirrors, convex mirrors, and diverging lenses can never produce a real image. A concave mirror and a converging lens will only produce a real image if the object is located beyond the focal point (i.e., more than one focal length away).