MENA3100,OBK, 18.01.18

Imaging – diffraction

and spectroscopy

Light

Imaging (avbildning)

Diffraction (diffraksjon)

Spectroscopy (spektroskopi)

Imaging−diffraction Spectroscopy

• Absorpsjon

• Reflection

• Scattering

• Interference

• (Diffraction)

Reflection

The incident ray, the reflected ray and the normal to the

reflection surface at the point of the incidence lie in the

same plane.

The angle which the incident ray makes with the normal is

equal to the angle which the reflected ray makes to the

same normal.

The reflected ray and the incident ray are on the opposite

sides of the normal.

https://www.google.no/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&cad=rja&uact=8&ved=0ahUKEwjxjcm95-DYAhWMjiwKHemLD98QjRwIBw&url=https://www.scienceabc.com/nature/why-does-the-sun-reflect-off-seas-and-oceans.html&psig=AOvVaw0zKxfkMFIAiWlqgj65PNEO&ust=1516340679661377

Refraction (brytning/refraksjon)

Snell’s law

Lenses (linser)

Liquids at 20 °C

Water 1.333

Ethanol 1.36

Olive oil 1.47

Solids

Ice 1.31

PMMA (acrylic,

plexiglas, lucite,

perspex)

1.49

Window glass 1.52

Polycarbonate

(Lexan™)1.58

Flint glass

(typical)1.62

Sapphire 1.77

Cubic zirconia 2.15

Diamond 2.42

Moissanite 2.65

The wave nature of electrons

Interference

Diffraction

Geometrical optics

Light rays

Light travels in straight lines (allmost true)

Spectroscopy