Experiment 6 convex and concave

Purpose:

In this exploration we will explore the image formed by both a convex and concave mirror, and learn how to draw a graph to determine the image in the convex and concave mirror. and find the relationship between the object out of the mirror and the image inside the mirror. what is different between convex and concave mirror, and different phenomenon of concave and convex mirrors

Equipment:

convex mirror
concave mirror
object
ruler
worksheets adn the end of this exploration



Experiment:

Part A: Convex Mirror

1 Place an object in front of a convex mirror. Describe the image charachteristics as comopletely as you can
(a) the image appear smaller than the object
(b)the image upright is upright
(c)the image located relative to the position of the mirror and object closer to the mirror
(d) move the object closer to the mirror, the image get bigger when move close to mirror
(e)the image become smaller when move the object further from the mirror

then we draw the graph use three line as the picture below.



we get
h0 = 3.1+-0.05 cm
hi = 0.6+-0.05 cm
d = 6.1 +-0.05 cm
di = 1.9 +- 0.05 cm

m = (image height)/(object height) = (0.6 cm)/(3.1 cm) = 0.194 ± 0.0164 cm

after the first experiment, we get the experiment conclusion is same as our prophecy.

Part B:

place an object in front of a concave mirror.

(a) the image appear larger than the size as teh object
(b) the image is inverted.
(c) the image located relative to the same position of the mirror and object.
(d) move the object until is is close to the mirror. the image is get smaller than the image.
(e)move the object much further from the mirror than it was in step 1, perhaps as much as a meter away. when we move the object away from mirror, the image become smaller.

then we draw a graph of concave mirror with three line the graph show below:

h0 = 3.1 +- 0.05cm
hi = 1.7+-0.05cm
d0 = 10.4+-0.05cm
di = 2.4 +- 0.05cm

We have the magnification.
m = (image height)/(object height) = (1.75 cm)/(3.1 cm) = 0.565 ± 0.0185 cm


Conclusion:

we get from the experiment, for the convex mirror, the image appear smaller than the object before the mirror, and the image in the convex mirror is upright, and the image located relative to the position of the mirror is closer to the mirror.
for the concave mirror, the image appear larger than the object in the front of the mirror, and the image is inverted in the mirror, and the image located relative to the position of the mirror and object.