The Simple Magnifier

Angular magnification

(2.14)

The Simple Magnifier

The Compound Microscope

Greater magnification can be achieved by combining two lenses in a device called a compound microscope.

The Telescope

Two	both are
	planets in our
Solar	combination of
	uses a curved

The Telescope

Quick Quiz 1

You are standing about 2 m away from a mirror. The mirror has water spots on its surface. True or false: It is possible for you to see the water spots and your image both in focus at the same time.

Quick Quiz 2

You wish to reflect sunlight from a mirror onto some paper under a pile of wood in order to start a fire. Which would be the best choice for the type of mirror?

(a)flat (b)concave

(c)convex.

Quick Quiz 3

You are standing about 2 m away from a mirror. The mirror has water spots on its surface. True or false: It is possible for you to see the water spots and your image both in focus at the same time.

Quick Quiz 4

In Figure, what happens to the image point I as the object point O moves toward the right-hand surface of the material of index of refraction n1?

(a)It always remains between O and the surface, arriving at the surface just as O does.

(b)It moves toward the surface more slowly than O so that eventually O passes I.

(c)It approaches the surface and then moves to the right of the surface.

Quick Quiz 5

What is the focal length of a pane of window glass?

(a)zero (b)infinity

(c)the thickness of the glass (d)impossible to determine