•The image formed by actual intersection of reflection rays is called real image. This can be caught on screen.
•The image formed by controlled rays of reflection is called virtual image. It can not be caught on screen.
Position of the candle (object)
Position of the image
Enlarged? diminished?
Inverted or erect
Real or virtual
Between mirror & F
Behind the mirror
Enlarged
Erect
Virtual
On focal point
At infinity
-
-
-
Between F and C
Beyond C
Enlarged
Inverted
Real
On centre of curvature
On C
Same size
Inverted
Real
Beyond C
Between F and C
Deminished
Inverted
Real
At infinity
at focus
point
-
Real
Improve your Learning
1. Reflections on concepts
1. Where will the image be formed when we place an object on the principal axis of a concave mirror at a point between focus and centre of curvature?(AS)
2 State the differences between convex and concave mirrors? (AS)
3. Distinguish between real and virtual images. (AS)
4. How do you get a virtual image using a concave mirror? (AS)
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
6. Write the rules for sign convention. (AS)
7. What do you infer from the experiment which you did to measure the object distance and image distance? (AS)
II. Application of concepts
1. Find the distance of the image when an object is placed on the principal axis at a distance of 10 cm infront of a concave mirror whose radius of curvature is 8 cm. (AS)
2.The magnification product by a mirror is +1. What does it mean?(AS)
3. If the spherical mirrors were not known to human beings, guess the consequences. (AS)