Ch. 1 - The Nature of Light

Question 1

term given to light that radiates/reflects uniformly in all directions

Answer 1

diffuse

Question 2

when a radiating (or reflecting) surface has a radiance that is independent of the viewing angle, the surface is said to be…

Answer 2

perfectly diffuse

A Lambertian surface.

Question 3

evidence that light travels like waves…

Answer 3

interference

Question 4

evidence that light travels as particles (photons)

Answer 4

photoelectric effect

Question 5

two events that produce gamma ray bursts

Answer 5

1) neutron star collapsing into black hole

2) 2 neutron stars “crashing” together

Question 6

EM Spectrum:
Length in (m)

10^4:
10^2:
1:
10^-4
10^-6
10^-8
10^-10
10^-12

Answer 6

10^4:     Radio
10^2:     TV/FM
1:            Microwaves
10^-4:    IR (NIR/FIR)
10^-6:    Visible
10^-8:    UV (VUV/NUV)
10^-10:   X-Ray (Soft/Hard)
10^-12:   Gamma Rays

Question 7

ALS uses…

Answer 7

VUV Soft X-Rays

Question 8

Radiometry

Answer 8

measurement and quantification of light