Science Basics

Question 1

Atom

Answer 1

Fundamental unit of matter

Question 2

Photons

Answer 2

Tiny particles made of light energy

Question 3

What makes Laser light?

Answer 3

When a packet of PHOTONS is forced through a mechanism (crystal)

Question 4

Wavelength

Answer 4

Beam of light, measured in nanometers.
Laser uses 1064nm(ND:YAG) and 755nm(ALEX)

Question 5

Pulse Duration

Answer 5

Measured in milliseconds (ms)
Amount of time laser emits energy

Question 6

Fluence

Answer 6

Measured in joules (J/cm2)
The amount of energy

Question 7

Spot size

Answer 7

Measured in millimeters (mm)
Area each pulse of laser covers

Question 8

1064(ND:YAG)

Answer 8

Deepest penetrating
Can be used on all skin types
Will bypass melanin in skin to target melanin in hair shaft

Question 9

755nm(ALEX)

Answer 9

Highly absorbed by melanin
Can be used on lighter skin
Ideal for hair with lighter pigments
Risk of pigmentation damage when used on darker melanin

Question 10

Chromophore

Answer 10

Part of a molecule (melanin) that absorbs or reflects wavelengths

Question 11

Thermal Relaxation Time (TRT)

Answer 11

Time required for half of heat from laser to target chromophore (melanin)