Write the Nature of image formed when object is placed at 15cm and 25cm from the pole of the concave mirror with focal length of 10cm
Answers
a. Center of Curvature (c) :
(Source: Wikipedia)
The Center of Curvature of a spherical mirror is the point in the centre of the mirror which passes through the curve of the mirror and has the same tangent and curvature at that point. It is denoted by the letter ‘c’.
b. Radius of Curvature (r):
It’s the linear distance between Pole and the Center of curvature. It is twice the focus
c. Pole (p) :
It’s the midpoint of the spherical mirror.
d. Principal axis:
It’s an imaginary line passing through the optical centre and the centre of curvature of any lens or a spherical mirror.
e. Aperture:
An aperture of a mirror or lens is a point from which the reflection of light actually happens. It also gives the size of the mirror.
f. Principal Focus :
Principal Focus can also be called as Focal Point. It’s on the axis of a mirror or lens wherein rays of light parallel to the axis converge or appear to converge after reflection or refraction. Principal Focus is also what determines the Focal Length of the mirror.
g. Focus:
It’s any given point, where light rays parallel to the principal axis, will converge after getting reflected from the mirro