#### Lensmaker’s equation

## What is r1 and r2 in lens maker formula?

R1 is the radius of curvature of the lens surface closest to the light source, R2 is the radius of curvature of the lens surface farthest from the light source, d is the thickness of the lens.

## How do you use thin lens equation?

Step 1: Find the focal length of the mirror (remembering that convex mirrors have negative focal lengths, by convention). Step 2: Find the image distance using the thin lens equation. Step 3: Use the magnification equation to relate the object distances and heights.

## How do you calculate focal length?

The lens equation says 1/f = 1/Do + 1/Di, where f is the focal length of the lens, Do is the distance from the object to the lens and Di is the distance from the lens to the in-focus projected image.

## What are the two types of lenses?

The two main types of lenses are:Convex Lens (Converging)Concave Lens (Diverging)

## WHAT IS lens formula?

What is Lens Formula? In optics, the relationship between the distance of an image (v), the distance of an object (u), and the focal length (f) of the lens is given by the formula known as Lens formula.

## What is a lens maker called?

Noun. 1. lens maker – a worker who makes glasses for remedying defects of vision. optician. skilled worker, skilled workman, trained worker – a worker who has acquired special skills.

## What is the formula of convex lens?

What is the Lens Formula for Convex Lens? Ans. According to the convex lens equation, 1/f = 1/v + 1/u. It relates the focal length of a lens with the distance of an object placed in front of it and the image formed of that object.

## What is the formula of magnification of lens?

The magnification produced by a lens is defined as ratio of the height of the image to the height of the object. It is denoted by “begin{align*}mend{align*}”. The magnification produced by a lens is equal to the ratio of image distance to the object distance.

## Is the magnification 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 is focal length with diagram?

Focal length. Focal length (shown in red) is the distance between the center of a convex lens or a concave mirror and the focal point of the lens or mirror — the point where parallel rays of light meet, or converge.

## What is focal length in physics?

For a thin lens in air, the focal length is the distance from the center of the lens to the principal foci (or focal points) of the lens. For a converging lens (for example a convex lens), the focal length is positive, and is the distance at which a beam of collimated light will be focused to a single spot.

## How is image distance calculated?

To calculate the image distance, the lens formula can be used.1/u+1/v=1/f.where.u is the object distance.v is the image distance.f is the focal length of the lens.If you know the focal length and object distance, using the above formula image distance can be calculated.

## What is a lens in physics class 10?

Lens: A lens is a piece of a refracting medium bounded by two surfaces, at least one of which is a curved surface. The commonly used lenses are the spherical lenses, which have either both surfaces spherical or one spherical and the other a plane one.

## What is a lens in physics?

A lens is a transmissive optical device that focuses or disperses a light beam by means of refraction. A simple lens consists of a single piece of transparent material, while a compound lens consists of several simple lenses (elements), usually arranged along a common axis.