# Properties of image formed by concave mirror

Article about Properties of image formed by concave mirror

Object distance is smaller than the focal length of the concave mirror (do < f)

Based on the calculation of the image formation by the concave mirror, it is concluded that if the object distance (do) is smaller than the focal length (f), then the properties of the image are:

– Virtual means that the beam of light does not pass through the image

– Upright

– The farther the object is from the concave mirror, the greater the size of the image

– The farther the object from the concave mirror, the farther the image from the concave mirror

Objects located at the focal point of the concave mirror (do = f)

Based on the calculation of the image formation by the concave mirror, it is concluded that if the object is located at the focal point of the concave mirror, the properties of the image are:

– Virtual means that the beam of light does not pass through the image

– Upright

– The image is at a finite distance

The object is between the focal point and the center of curvature (f < do <R)

Based on the calculation of the image formation by the concave mirror, it is concluded that if the object is between the focal point and the radius of the mirror curvature, the properties of the image are:

– Real means the beam of light passes through the image

– Inverted

– The farther the object from the concave mirror, the smaller the image size

– The farther the object from the concave mirror, the closer the image from the concave mirror

Objects located at the center of curvature (do = R)

Based on the calculation of the image formation by the concave mirror, it is concluded that if the object is located at the center point of the concave mirror curvature, the image properties are:

– Real means the beam of light passes through the image

– Inverted

– Size of image = size of object

– The image distance = the object distance

Object distance is greater than the radius of curvature of the concave mirror (do > R)

Based on the calculation of the image formation by the concave mirror, it is concluded that if the object distance is greater than the radius of the curvature of the mirror, the properties of the image are:

– Real means the beam of light passes through the image

– Inverted

– The farther the object from the concave mirror, the smaller the image size

– The farther the object from the concave mirror, the closer the image is from the concave mirror

1. What is the nature of the image formed by a concave mirror when the object is placed at infinity?

The image is real, inverted, and highly diminished. It is formed at the focus of the concave mirror.

2. Describe the characteristics of an image formed by a concave mirror when the object is placed beyond the centre of curvature.

The image formed is real, inverted, and diminished. It is formed between the focus and the centre of curvature.

3. What happens to the image formed by a concave mirror when the object is placed at the centre of curvature?

When the object is at the centre of curvature, the image is real, inverted and of the same size as the object. The image is also formed at the centre of curvature.

4. What are the characteristics of the image formed when the object is placed between the centre of curvature and focus in a concave mirror?

In this case, the image is real, inverted and magnified. It is formed beyond the centre of curvature.

5. What is the nature of the image formed when the object is placed at the focus of a concave mirror?

The image is formed at infinity and it is real, inverted, and highly magnified.

6. How does the image formed by a concave mirror change when the object is placed between the pole and the focus?

When the object is placed between the pole and the focus of a concave mirror, the image formed is virtual, erect, and magnified. The image is formed behind the mirror.

7. How does the image size compare to the object size when the object is placed at the focus of a concave mirror?

When the object is placed at the focus, the image size is extremely large compared to the object size, as the image is formed at infinity.

8. Can a concave mirror form both real and virtual images? Explain why.

Yes, a concave mirror can form both real and virtual images. When the object is placed between the pole and the focus, the image formed is virtual, erect, and magnified. For all other positions of the object, the image is real and inverted.

9. How is the mirror equation related to the properties of images formed by a concave mirror?

The mirror equation 1/f = 1/v + 1/u relates the object distance (u), image distance (v), and focal length (f). This equation helps in predicting the position, nature, and size of the image. Here, a concave mirror has a negative focal length, a real object has a negative object distance, and a real image has a negative image distance.

10. What is the significance of the magnification in the context of the image formed by a concave mirror?

Magnification (m) is defined as the ratio of the height of the image (h₂) to the height of the object (h₁), i.e., m = -v/u = h₂/h₁. The negative sign indicates that the image is inverted. If |m| > 1, the image is magnified; if |m| = 1, the image is of the same size as the object; and if |m| < 1, the image is diminished.