IMAGE FORMED BY SPHERICAL MIRROR

Concave mirror - Image formation

Take a concave mirror of focal length of concave mirror 10 cm . Take a chart paper and mark P,F and C. Place the concave mirror on a stand. Place the stand over the line such that its pole lies over the line.. A burning candle, at a position far beyond C. Place a paper screen and move it in front of the mirror till you obtain a sharp bright image of the candle flame on it. Observe the image carefully. Note down its nature, position and relative size with respect to the object size. - Repeat the activity by placing the candle -(a) just beyond C, (b) at C, (c) between F and C, (d) at F, and (e) between P and F. In one of the cases, you may not get the image on the screen. Identify the position of the object in such a case.

a. Object is at infinity

b. Object is beyond C

c. Object is at centre of curvature (C)

d. Object is in between C and F

e. Object is at F

f. Object is in between P and F 

Image formation by a concave mirror for different positions of the object

Position of the object	Position of the image	Size of image	Nature of image
At infinity	At the focus F	Highly diminished, point sized	Real and inverted
Beyond C	Between F and C	Diminished	Real and inverted
At C	At C	Same size	Real and inverted
Between C and F	Beyond C	Enlarged	Real and inverted
At F	At infinity	Highly enlarged	Real and inverted
Between P and F	Behind the mirror	Enlarged	Virtual and erect

Convex mirror – Image formation.

Image formation by a convex mirror for different positions of the object

Position of the object	Position of the image	Size of image	Nature of image
At infinity	At the focus F, behind the mirror	Highly diminished, point sized	Virtual and erect
Between C infinity and P	Between P and F, behind the mirror	Diminished	Virtual and erect

Test