MIRROR FORMULA
Light of Class 9
MIRROR FORMULA
Let us first know about the terms used in the mirror formula of spherical mirrors.
- Object distance (u) : The distance of the object from the pole ‘P’ of the spherical mirror is called the object distance. It is denoted by the letter ‘u’
- Image Distance (v) : The distance of the image from the pole ‘P’ of the spherical mirror is called the image distance. It is denoted by the letter ‘v’.
- Focal length (f) : The distance of the principal focus (F) from the pole (P) of the spherical mirror is called the focal length. It is denoted by the letter ‘f ‘.
The relationship between the image distance (v), object distance (u) and focal length (f ) of a spherical mirror is known as the mirror formula. The Mirror formula can be written as :
Symbolically 1/v + 1/u = 1/f
where the symbols have their usual meaning.
POWER OF MIRROR:
A spherical mirror has infinite number of focus. Optical power of a mirror (in Dioptres)
= -1/f(in meters)
Related Topics
- Introduction Light
- REFLECTION OF LIGHT
- LAWS OF REFLECTION
- Some Important Terms Related To Spherical Mirrors
- IMPORTANT CONCEPT
- REFRACTION OF LIGHT
- Mind Map
- SOME IMPORTANT TERMS RELATED WITH LIGHT
- Some Important Terms Used In The Reflection Of Light
- IMAGES
- PLANE MIRROR
- MIRROR FORMULA
- LINEAR MAGNIFICATION PRODUCED BY MIRRORS
- Solved questions
- Exercise 1
- Exercise 2
- Exercise 3
- Exercise 4 (True and False)
- Exercise 5 (Subjective)
