principle of light Flashcards
which form of energy light is
electromagnetic energy
how does the power line carry electromagnetic energy
inform of electricity
how does electromagnetic spectrum work
it extends from wavelength of many meters to wavelength of submicroscopic size
does color and frequency and light relate
yes e,g red light frequency is lower than blue light
how is white light made
it is made by mixture of different frequency light
where does light breaks in spectrum [rainbow] of colors
in prism
what device breaks down light
spectrograph
a part of electromagnetic spectrum that can be detected by human eye and at what spectrum
visible light,,,,,,, which is 7
which color object absorbs all colors except its own color
red object
which object absorbs all colors, and which reflects all
black and white
what are characteristics that electromagnetic radiations share when contacting a biological tissue
they are; reflected
transmitted
refracted
absorbed
what are the laws governing effect of electromagnetic
law of grotthus-draper and cosine law
state law of grotthus-draper
if energy not absorbed must be transmitted to dipper tissue
greater amount absorbed, lesser transmitted, lesser penetration
the smaller the angle btn propagating radiation and right angle, the less radiation reflected the greater the absorption
cosine law
what is laser
it is the Light Amplification by the Stimulated Emission of Radiation
what is the cold part of laser
red part from electromagnetic spectrum
properties of laser
monochromatic [single wavelength and color
coherent [straight line]
polarized [concentrates its beam in different location]
what does laser do
it penetrates the skin
it directs bio stimulative energy to body cells that promotes healing and pain relief
it optimizes the immune response of blood
has immunosuppressive and anti-inflammatory effect
does laser cause anything when penetrating the skin
no heating effects
no side effects
no damage to skin
what are the physiological effects of laser
wound healing
increase collagen production
increase macrophages activities
alters nerve conduction activities
what does magnitude of tissue reaction depend on
depends on; output wavelength or frequency
density of power
duration of treatment
vascularity of target tissue
which light is more selectively absorbed by specific proteins in cell membrane
infrared light
how does hit work
=it is based on low level laser therapy
=with high power and right wavelength choice allow deep penetration
=through natural process of energy transfer
=can be used in 2 modes
how does hit stimulate natural process of healing
bio stimulation and photomechanical
