# What happens when light hits a concave mirror?

## What happens when light hits a concave mirror?

When parallel light rays hit a concave mirror they reflect inwards towards a focal point (F). Each individual ray is still reflecting at the same angle as it hits that small part of the surface.

Is the focal length of a concave mirror positive or negative?

The focal length f of a concave mirror is positive, since it is a converging mirror. Figure 2.

### What happens to an image at the focal point of a concave mirror?

When the object is located at the focal point, no image is formed. As discussed earlier in Lesson 3, light rays from the same point on the object will reflect off the mirror and neither converge nor diverge.

What happens when light is reflected on a convex mirror?

A convex mirror is sometimes referred to as a diverging mirror due to the fact that incident light originating from the same point and will reflect off the mirror surface and diverge. After reflection, the light rays diverge; subsequently they will never intersect on the object side of the mirror.

## What happens to the light rays that reflect from the mirror?

Also, when light is reflected from a mirror, it bounces off at the same angle in the opposite direction from which it hit. If the mirror is convex, or curved outward, it will reflect a wider area, in which images appear smaller and farther away than those from a flat mirror.

How do you find the focal length of a concave mirror?

1. The mirror formula is 1f=1v+1u.
2. The magnification m is given by m=−vu.
3. According to sign conventions, for a concave mirror, the focal length (f) is negative, the object distance (u) is negative, the image distance (v) is positive for a virtual image and negative for a real image.

### What is a focal length of a mirror?

The focal length ( f ) is the distance from a lens or mirror to the focal point ( F ). This is the distance from a lens or mirror at which parallel light rays will meet.

Why concave mirrors have negative focal length?

The focal length of a concave mirror is negative because the focus of a concave mirror is in front of the mirror, on the left side. Whereas, The focal length of a convex mirror is positive because the focus of a convex mirror is behind the mirror, on the right side.

## Which mirror has a negative focal length?

concave mirror
Focal length is positive for a convex mirror and negative for concave mirror.

How will you find the focus and focal length of a concave mirror?

Focal Length – The space between the pole P of a concave mirror and the focus F is the focal length of a concave mirror. By obtaining the Real image of a distant object at its focus, the focal length of the concave mirror can be estimated as shown in the diagram.

### What is the formula for a concave mirror?

f is+if the mirror is a concave mirror

• f is – if the mirror is a convex mirror
• d i is+if the image is a real image and located on the object’s side of the mirror.
• d i is – if the image is a virtual image and located behind the mirror.
• h i is+if the image is an upright image (and therefore,also virtual)
• What is the focal point of a convex mirror?

Q1. Differentiate between convex lens and concane lens.

• Q2. Name two types of spherical mirrors Ans: Following are the two types of spherical mirror: Concave mirror Convex mirror
• Q3. What is the relationship between focal length T and the radius of curvature R of a concave mirror?
• Q4. What is the mirror formula?
• Q5. What is law of reflection for a mirror?
• ## What is the magnification of a convex mirror?

The pole (p) of the mirror acts as the origin.

• The principal axis acts as the x-axis of the coordinate system.
• The object is kept on the left of the mirror.
• The distances that are parallel to the principal axis are to be measured from the pole (p).
• What are the characteristics of a convex mirror?

located behind the convex mirror

• a virtual image
• an upright image
• reduced in size (i.e.,smaller than the object)