Question

a concave mirror forms image of an object rise in its size on a screen magnification of a mirror gives information about the size of the image relative to the object it is defined as the ratio of size of image to the size of object is represented by M M equals to size of image upon size of object sign of the magnification of a mirror gives the information about the nature of the image produced by m.

m=size of image
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size of object

sign of magnification by murder get information about nature of the image produced by it.

1)describe the nature of image formed.
2)if the attic is placed x distance from the pole of mirror, then find image distance from the pole.
3)if the radius of curvature of murder is R, then tried to relation between object distance, image distance and focal length of the mirror.
4)give one use of concave mirror.​

Answer 1

The sign of magnification describes the nature of image formed.

Explanation:

The magnification of a mirror gives information about the size of the image relative to the object. It is defined as the ratio of size of image to the size of object. It is given by :

$m=\dfrac{h'}{h}$

h' is the size of image

h is the size of object

The magnification can be positive or negative. The sign of magnification describes the nature of image formed. Positive magnification shows the image is virtual and negative magnification shows the image is real.

The correct option is (A).

Learn more,

Magnification

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Answer 2

Explanation:

(i) Since, image is formed on screen. So, it must be real and inverted.

(ii) Here, u = - x

m = (- v)/u

- 3 = (- v)/(- x)

v = - 3x

Hence, the image is placed at a distance 3 times the object distance in the same side.

(iii) 1/(3x) + 1/x = 2/R

[f = R / 2]

(iv) It is used in search light and headlight of automobiles.

hope it will help you