#### Mirror equation

## What is the mirror formula?

It is an equation relating object distance and image distance with focal length is known as a mirror equation. It is also known as a mirror formula. In a spherical mirror: The distance between the object and the pole of the mirror is called the object distance(u).

## How do you solve a convex mirror equation?

The equation of convex mirror do = object distance, di = image distance, h = P P’ = object height, h’ = Q Q’ = image height, F = the focal point of the convex mirror. Always remember the sign rules of the convex mirror when using this equation to solve the problems of the convex mirrors.

## What is the difference between mirror formula and lens formula?

What is the difference between Real and Virtual Image?Difference between Mirror and Lens.

Mirror | Lens |
---|---|

A mirror can be plane or spherical (concave or convex) | A lens is usually curved from either one or both surfaces. |

Mirror formula is 1/f = 1/v + 1/u | Lena formula is 1/f = 1/v – 1/u |

## What is the mirror formula for spherical mirrors?

However, as discussed above, in the small-angle approximation, the focal length of a spherical mirror is one-half the radius of curvature of the mirror, or f=R/2. Inserting this into Equation 2.3. 11 gives the mirror equation: 1do+1di=1f⏟mirror equation.

## Is V positive in concave mirror?

➡ For convex mirrors, the image is always virtual. Let, u = object distance from pole of a mirror. ➡ When the image is virtual, then “u” is as it is negative, “v” is positive, ”f” is negative. THUS, IN CASE OF CONCAVE MIRROR, FOCAL LENGTH ALWAYS REMAINS NEGATIVE.

## What is a mirror in physics?

A mirror is a device that contains a surface used to reflect light. Because mirrors do not usually absorb much light, most of the light is redirected upon contact with the mirror and the object’s overall quality is usually preserved in the new image.

## What is convex mirror formula?

Suppose an object is placed u cm in front of a spherical mirror of focal length f such that the image is formed v cm from the mirror, then u, v and f are related by the equation; 1/f= 1/u + 1/v. This equation is referred to as the mirror formula. The formula holds for both concave and convex mirrors.

## What is convex mirror with diagram?

Ray Diagram for Convex and Concave Mirror A spherical mirror is a part of a spherical reflecting surface. Convex mirror is a curved mirror for which the reflective surface bulges out towards the light source. Convex mirrors reflect light outwards (diverging light rays) and therefore they are not used to focus light.

## 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.

## Is a lens a mirror?

Mirror implies a glass surface with a silvery backing, that produces image through reflection. Lens is a transparent substance of glass or plastic, bound by two surfaces, whose at least one surface is curved. It can be plane or curved. It is usually curved, with one or both sides.

## Which lens is used in plane mirror?

2) Concave Lens:

Mirror | Lens |
---|---|

It reflects the light that falls on its surface. | It refracts the light. Convex lens converges and concave lens diverges the light. |

It can be plane or spherical. | It has two surfaces out of which one is curved inwards or outwards. |

## What is the use of lens formula?

The lens formula is applicable to all situations with appropriate sign conventions. This lens formula is applicable to both the concave and convex lens. If the equation shows a negative image distance, then the image is a virtual image on the same side of the lens as the object.

## What is called a spherical mirror?

A spherical mirror is a mirror which has the shape of a piece cut out of a spherical surface. There are two types of spherical mirrors: concave, and convex. These are illustrated in Fig. 68. The most commonly occurring examples of concave mirrors are shaving mirrors and makeup mirrors.

## Which mirror is used by dentist?

A concave mirror gives the dentist a magnified reflection of the mouth while also refracting a bit of light. This means the image in the mirror is larger, brighter, and, for the dentist, easier to see. Another plus of using a concave mirror is that the image in the mirror isn’t inverted.