5. What do you know about the terms given below related to spherical mirrors? (AS)
a) Pole
b) Centre of curvature c) Focus
d) Radius of curvature e) Focal length f) Principal axis
g) Object distance
h) Image distance i) Magnification
Answers
Explanation:
Magnification:-
It is the ratio of size of image to the size of object
Object distance:-
Distance of object from mirror
Image distance:-
Distance of image from the mirror
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Answer:
a) Pole :
the centre of reflecting surface of a spherical mirror is a point called as pole, represented by P.
b)centre of curvature:
the reflecting surface of a spherical mirror forms a part of a sphere. this sphere has a centre, and this centre is called centre of curvature. represented by C.
c)Focus:
the midpoint between C and P is called focus(F).
d) radius of curvature:
the radius of the sphere which your spherical is a part of is called radius of curvature (R).
e) focal length:
the length from focus point to the pole is called focal length, denoted by f.
f) principal axis:
a straight line passing through C and P of the sperical mirror is called principal axis.
g) object distance:
length from the pole to the point where object is placed. denoted by u.
h) image distance:
length from pole to the point where the image is formed us image distance denoted by v.
I) magnification:
magnification produced by a spherical mirror gives the relative extent to which the image of an object is magnified w.r.t the object size. denoted by m.
magnification (m)= height of image (h')/ height of object (h)
m= h'/h= -v/u