Physical optics (2 questions) Flashcards
Put in order from highest to lowest frequency on the spectrum:
1) television waves
2) UV
3) radio waves
4) IR
5) Gamma rays
6) microwaves
7) visible
8) radar waves
9) X-rays
highest-lowest: Gamma rays, X-rays, UV, visible, IR, microwaves, radar waves, television waves, radio waves
Match the following:
1) UV-A
2) UV-B
3) UV-C
a) 290-200nm
b) 320-290nm
c) 400-320nm
1) UV-A–c) 400-320nm
2) UV-B–b) 320-290nm
3) UV-C–a) 290-200nm
When particles that cause scattering are much smaller than the wavelength of light…
a) Rayleigh scattering
b) Brewsters scattering
c) Tyndall scattering
d) Malus scattering
a) Rayleigh scattering (underlies reddish-orange colors during sunset)
* tyndall scattering is when particles are much larger than the wavelength of light (underlies the white appearance of clouds)
Which law is applied in the design for polarized glasses?
a) Rayleigh’s law
b) Brewster’s law
c) Tyndall’s law
d) Malus’ law
b) Brewster’s law (involves trig fxn calculations that wont be on exam)
* Malus law states that when unpolarized light is incident on a polarizer, the intensity of light transmitted is half that of incident light
Unpolarized light of an intensity (I0) passes thru a single polarizer and then that transmitted light passes thru a second polarizer rotated 45 degrees with respect to the first polarizer. What is the intensity of light transmitted thru the 2nd polarizer?
a) 100%
b) 75%
c) 50%
d) 25%
e) 12.5%
d) 25% (bc intensity transmitted =half intensity of incident light 100% to 50% to 25%)
(T/F) polarized light can be linear, circular, or elliptical
true
_____ refers to bending waves around obstacles
diffraction
Which 2 are true regarding diffraction?
a) Fraunhofer: far field diffraction
b) Fresnel: near field diffraction
c) Fraunhofer: near field diffraction
b) Fresnel: far field diffraction
a) Fraunhofer: far field diffraction
b) Fresnel: near field diffraction
