Caroline. I do not understand why the image should be larger than the object.
Mrs. B. This results from the convergent property of the concave mirror. If an object, A B, ([fig. 7.]) be placed between the mirror and its focus, the rays from its extremities fall divergent on the mirror, and on being reflected, become less divergent, as if they proceeded from C: to an eye placed in that situation, the image will appear magnified behind the mirror at a b, since it is seen under a larger angle than the object.
You now, I hope, understand the reflection of light by opaque bodies. At our next meeting, we shall enter upon another property of light, no less interesting, and which is called refraction.
Questions
1.(Pg. [168]) What is meant by the angle of vision, or the visual angle?
2.(Pg. [169]) Why do objects of the same size appear smaller when distant, than when near?
3.(Pg. [169]) Why do not two objects, known to be equal in size, appear to differ, when at different distances from the eye?
4.(Pg. [169]) How is this exemplified, by a house seen through a window?
5.(Pg. [170]) Why do rows of trees, forming an avenue, appear to approach as they recede from the eye, until they eventually seem to meet?
6.(Pg. [170]) In drawing a view from nature, what do we copy?