Test #7 Flashcards
Wave speed formulation
V=λF
What is a wave?
A repeated disturbance that is propagated along a medium
What are the different types of waves?
Transverse and Longitude
Why does a blue object appear blue in white light?
because it reflects blue like and absorbs every other color
What wavelength of light is white light?
all wavelengths of light combined become white light
Electromagnetic spectrum
All the types of light or Electromagnetic waves Here in order of:
Lowest energy
Longest wavelength
Lowest frequency
Radio waves
Big long waves- used to transmit data
Radio waves examples
Cell phone signals, radio (AM. FM) television. Long distance communication.
microwave waves
slightly smaller (mostly harmless)
microwave examples
In kitchen microwave – in wifi, Bluetooth. Fast short distance communication.
infrared light
closest to visible light but too low frequency for most to see.
infrared examples
Used in remotes, night vision, thermal vision, and heat lamps.
visible light
The type of light we can see. ROYGBV
visible examples
Light bulbs, Rainbows, Screens of all kinds, LEDS
Ionization radiation light but causes damage to cells.
UV/Ultraviolet
close to visible light, but has more energy
UV/Ultraviolet examples
Tanning beds (dangerous), Sunscreen. Light Disinfectants
X-rays
high energy light. Translucent to soft tissues, not hard tissues.
X-rays examples
medical x-rays
Gamma rays
Highest energy, rarest, seldom seen on earth.
Gamma Rays
high energy space explosions
Mnemonic devices-
R M I V U X G
ROYGBV
trasnparent
all waves can pass through
translucent
some waves can pass through
opaque
no waves can pass through
absorb
the wave is taken in
reflect
the ave bounces off
refract
bend light as it passes through
wavelength
a measure of a wave’s length. measured in meters
frequency
the number of waves that pass through in a second measured in Hertz
velocity
