UPSC CDS 1 2022 GK Paper

- It is also a ratio between the distance of the image to the distance of the object from the lens.
⇒m=‌

hi

h0

=‌

v

u

⇒m=‌

hi

ho

=‌

v

u

- If magnification is more than 1, the image is magnified and if it is less than one image is diminished.
- If magnification is positive, the image is erect, virtual and if it is negative, the image is inverted, real.
​

• Magnification, m = +2 represents the case of an Enlarged image and hence it must be a Convex Lens.
• The image formed by a Convex lens is Erect and Virtual.
• Hence the image is erect, virtual, and larger than the object.