5 Flashcards
photon of x-radiation and photon of VL are same except x-radiation has higher frequency and shorter wavelength
(no answer)
higher frequency = short wavelength
lower frequency = long wavelength
behaves more like waves
VL
behave more like particles
x-ray photons
measured in meters (interacts with metal rods called antennas)
radio & TV waves
measured in centimeters (interacts with objects of same size)
microwaves
interacts with molecules
UV light
measured in nanometers (interacts with living cells)
VL
interacts with electrons and atoms
x-rays
when light photon strikes an object, it sets the object’s molecules into vibration
(no answer)
photon strikes object = vibration
VL spectrum extends from short wavelength (violet radiation through green and yellow) to long wavelength (red radiation)
(no answer)
VL spectrum extends from short wavelength (violet radiation through green and yellow) to long wavelength (red radiation)
what determine which wavelengths of light are reflected?
atomic and molecular structures
if wavelengths of light is not reflected, it is not absorbed
leaf is green because the wavelength of light is reflected
(no answer)
object with color = reflected ang light
without color = absorbed ang light
pag na-absorb, hindi siya nagpapass through sa object
structures that absorbs x-rays.
low absorbing
radiopaque
(bone = white)
structures that transmit x-rays
highly absorbing
radiolucent
(soft tissue = black/gray)
intensity decreases when the distance of object increases
inverse square law
inverse square law
l1/l2 = d2/d1
x-ray energy ranges approximately..
1 keV to 50 MeV
associated wavelength of x-ray energy is approximately…
10 -10 to 10 -14 m
all electromagnetic radiation can be visualized as
two perpendicular sine waves that travels in straight line at speed of light
(electric field and magnetic field)
he synthesized our understanding of electromagnetic radiation into a uniform model
Max Planck
Max Planck received Nobel Prize in
1918
theory that says x-rays created with speed of light and they exist with velocity
Planck’s quantum theory
relationship of energy and frequency
directly proportional
constant of proportionality, known as..
Planck’s constant (h)
h = 4.15 × 10 -15 eVs or 6.63 × 10 -34 Js
Planck’s equation
f = E/h
E = fh
E = ch/λ
λ = hc/E
relationship of Energy and wavelength is
inversely proportional
(longer wavelength = lower energy)
one joule is equal to 6.24 × 10 18 eV
1J = 6.24 × 10 18 eV
example of conversion of energy into mass
pair production
matter can be transformed into energy
sabi ni einstein at planck HAHA
