Microscopic techniques

Question 1

optical microscopy

Answer 1

use visible light and a system of lenses to get magnified images of small samples
400 - 700 nm in wavelength

Question 2

wavelength (m)

Answer 2

distance from a point in a cycle to the corresponding point in the next
peak to peak, trough to trough

Question 3

frequency (Hz)

Answer 3

number of vibrations of a given wavelength in one second
longer wavelength = lower frequency

velocity = freq x wavelength

Question 4

Absorption

Answer 4

all light enters, nothing exits (thermal, electrical, chemical changes)

Question 5

reflection

Answer 5

all light is turned back into the incident material
rough surface = more diffuse reflection, less specular reflection

Question 6

refraction

Answer 6

ray bent when passing between 2 transparent materials = change in velocity
affected by incident angle and wavelength of incident ray and surface

Question 7

refractive index

Answer 7

sin angle1 / sin angle2 = n1/n2 = v1/v2