# What is mirror formula for concave lens?

## What is mirror formula for concave lens?

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 concave mirror and lens?

A concave mirror is opaque whereas a concave lens is transparent. A concave mirror can form both real, inverted images of various sizes and virtual, erect and enlarged images depending on the position of the object whereas a concave lens forms only virtual, diminished and erect images for all positions of the object.

Do concave mirrors produce real images?

Only a concave mirror can be used to produce a real image; and this only occurs if the object is located at a position of more than one focal length from the concave mirror. Plane mirrors never produce real images. A concave mirror will only produce a virtual image if the object is located in front of the focal point.

### What is the difference between concave and convex mirror?

A convex mirror is curved outwards, and concave mirror is curved inwards. (B). The focal point is in front of the convex mirror, and for a concave mirror, it is behind. The fundamental difference between them is that the reflective surface of a concave mirror is inside the sphere and that of a convex mirror is outside.

### Is U positive in concave mirror?

Since as object is always placed to the left side of a mirror, therefore, the object distance (u) is always negative. If the image is formed behind a concave mirror, the image distance (v) is positive but if the image is formed in front of the mirror , then the image distance will be negative.

Are real images always inverted?

Real image is found when the rays of light converge at a point after reflection on a mirror or after refraction through a lens. Therefore, the image formed will be an inverted image. Hence, a real image is always inverted. Therefore, the statement that a real image is always erect is false.

#### What is concave mirror with example?

Concave mirror v/s convex mirror – result

Concave mirror Convex Mirror
The examples of concave mirrors are the mirrors used in automobile head lights, reflecting telescopes, torch lights, etc. The examples of convex mirrors are the mirrors used as rear side mirrors of vehicles, optical instruments, calling bell, etc.

#### Is convex lens positive or negative?

Additional Information: Power of convex lens is positive as it converges the light rays incident on it. Convex lens is also referred to as a converging lens. For mirrors there is a slight difference in the formula of power but the meaning is the same. So the focal length of the concave mirror is negative.

What are two examples of concave lens?

There are many examples of concave lenses in real-life applications.

• Binoculars and telescopes.
• Eye Glasses to correct nearsightedness.
• Cameras.
• Flashlights.
• Lasers (CD, DVD players for example).

## Quelle est la différence entre un miroir convexe et un concave ?

La différence entre les miroirs convexe et concave réside dans la manière dont ils réfléchissent les rayons lumineux. Un miroir convexe a une surface réfléchissante qui fait saillie à l’extérieur. Au contraire, dans un miroir concave, la surface réfléchissante se replie vers l’intérieur.

## Est-ce que dans un miroir concave la surface réfléchissante se gonfle vers l’intérieur ?

Au contraire, dans un miroir concave, la surface réfléchissante se gonfle vers l’intérieur.

Quel est le type de miroir ?

Miroir fait référence à toute surface lisse polie ou brillante pouvant réfléchir le faisceau lumineux et former des images. Il peut être de deux types: miroir plat et miroir sphérique. Le miroir dont la surface réfléchissante est plate est un miroir plat, tandis que le miroir à surface réfléchissante incurvée est appelé miroir sphérique.