Advertisements
Advertisements
प्रश्न
What is meant by magnification? Write its expression. What is its sign for the (a) real (b) virtual, image?
Advertisements
उत्तर
Magnification is the ratio of the length of image to the length of the object.
m = `1/"O"`
It is also given as
m = `-"v"/"u"`
Where, u and v is the object and image distance, respectively.
Hence, we have
- For real image: u and v are negative. So, m is negative.
- For virtual image: u is negative and v is positive. So, m is positive.
APPEARS IN
संबंधित प्रश्न
Write the formula for a lens connecting image distance (v), object distance (u) and the focal length (f). How does the lens formula differ from the mirror formula?
Write the spherical mirror's formula and explain the meaning of each symbol used in it.
Which mirror will you prefer to use as a rear view mirror in a car : plane mirror or convex mirror? Give one reason.
Upto what maximum distance from the pole the image in a convex mirror can be obtained? what will be the location of object then ?
If the focal length of a spherical mirror is 10 cm, what is the value of its radius of curvature?
The distance from the center of curvature of the mirror to the pole is called the focal length of the mirror.
Define the radius of curvature.
In the figure shown, the image of a real object is formed at the point I. AB is the principal axis of the mirror. The mirror must be:
