Lec 19

Question 1

Laser particle size analysis adv(analyser optical system)

Answer 1

1)faster speed
2)ease of operation
3)ability to measure both powder and dispersion
4) reproducibility of measured results

Question 2

Application laser size

Answer 2

1)analysis in medical area
2)analysis of drug and food
3) paint and pigment used

Question 3

2 theory of laser size

Answer 3

1) mie (diffraction and diffusion of light,above and below 10mm,refractive index)

2)fraunhofer( larger than 10mm,diffraction of light scattering,non pours and opaque)

Question 4

Ring particle size

Answer 4

Large particles:produce closely situated rings
Small particles:produce more widely spaced rings