The electromagnetic spectrum is continuous and there is no sharp division between one kind of wave a

1

• The electromagnetic spectrum is continuous and
  there is no sharp division between one kind of
  wave and the next. Assuming that the preceding
  statement is true, how do physicists distinguish
  one type of electromagnetic wave from another?

2
Polarization

• A condition in which transverse waves vibrate
  consistently in a single plane. Electromagnetic
  radiation such as light is composed of transverse
  waves and can be polarized. Certain kinds of
  light filters, including sunglasses that reduce
  glare, work by filtering out light that is
  polarized in one direction.

3

• Types of polarizers
• Sunglasses
• Polarizing filters/lenses

Polarization naturally occurs when Light is
reflected Light passes through a polarizing
filter
You would be able to filter out the reflected
light, then, by using a polarizing filter or lens
4
Does the color of the light change when the light
becomes polarized?
What is changing when the light becomes polarized?
Photographers often put polarizing filters over
the camera lens to take pictures of the ski. The
clouds remain white through the filter while the
sky looks darker. Explain why the sky looks
darker based on your new knowledge of polarized
light.
5
What isThe equation for Luminous Intensity
6
If a give you the Luminous Intensity of a light
source how do you find the Illuminance?
7
As a source of light in the sky moves away from
the observer, will the light become blue shifted
or red shifted?
Red shifted
8
Green light has a _______________ wavelength then
red light (bigger/smaller)
Smaller
9
The wavelength of violet light is about how many
nm?
Between 400-450 nm
10
(No Transcript)