Medical Case Module 5: Scattering, Absorption, Dispersion, and Polarization

What is the relative Rayleigh scattering intensity for 500 nm light compared to 600 nm light?

2.1

The higher the index matching...

(all the above)

The higher the transmitted component

The higher the transparency

The lower the difference between refractive index in two successive layers

The lower the albedo

What is the physical explanation for Charlize Teron's green eyes?

The back scattered light (blue) interacts with the light pigmentation of the iris (yellow) to create the green color

The smaller the distance between fibrils...

The less orders of diffraction occur and the more transparent is the stroma

Does the statement "There is no blue on the sky nor white on the clouds" mean that all we see is the effect of scattering?

false

In terms of coherent scattering theory why does an edematous cornea lose transparency?

Destroying the condition of index matching on the epithelial layer. In oxygen deprived cornea, water accumulates between cells causing refractive index changes at each cell boundary, causing loss of transparency.

What is the albedo value when the thickness of the scattering media (d) tends to infinity?

1

What is the transmitted value when asymmetry parameter g is 1?

1

Consider a multiple incoherent isotropic scattering medium in which the product of the scattering coefficient β and the thickness d is 6 (i.e., βd=6). What is the transmission coefficient and albedo for this scattering medium?

T = 0.25, R (albedo) = 0.75

Horizontally polarized light is incident on an ideal polarizer in which the transmission axis is rotated 30 degrees from the horizontal. What percent of the incident light is transmitted?

75%

Unpolarized light is incident on an ideal polarizer in which the transmission axis is rotated 60 degrees from the horizontal. What percentage of the incident light is transmitted?

50%

Unpolarized light is incident on a system with two polarizers. The transmission axis of the second polaroid is rotated 36 degrees from that on the first. If the polarizers are ideal, what percent of the incident light is transmitted by the two polaroid system?

33%

In a system with three polarizers, the first and last polarizers have perpendicular transmission axes, while the middle polaroid has a transmission axis rotated 45 degrees from the first. For ideal polaroids, what percentage of the incident light is transmitted through the system with three polarizers?

12.5 %

Does a dipole emit energy on the direction of the movement of the charges?

No

For light in air incident on high index plastic (n=1.66), what incident angle results in 100% polarization in the reflected light?

58.93 degrees

For light in a medium index plastic (n=1.54) incident on a glass-air interface, what incident angle results in 100% polarization in the reflected light?

33 degrees

What is the Brewster's angle for Polycarbonate (n=1.58)?

57.66 degrees

Would your sun glasses stop the reflections coming from the windows on a skyscraper?

No