Radiant Energy or Electromagnetic Energy (EM). All radiant energy travels at 3.0 x 10 8 m/sec in space Velocity of a wave = wavelength x frequency Visible light is just one type of EM Energy. Electromagnetic Spectrum. All of the forms of radiation given off by vibrating electric charges.
All of the forms of radiation given off by vibrating electric charges
Radiation comes in the form
of vibrating or “throbbing
bundles of energy” called
The frequency of the vibrating
electric charges determines
which type and how much
energy will be given off
f-frequency and λ is wavelength (distance between identical points on two consecutive waves)
Reflection- bounce off barriers in regular ways
Refraction- waves can change direction when speed changes
J 3300 Hz
38 At 0°C sound travels through air at a speed of 330 m/s. If a sound wave is produced with a wavelength of 0.10 m, what is the wave’s frequency?
F 0.0033 Hz
G 33 Hz
H 330 Hz
J 3300 Hz
Use the formula chart!!!
Velocity = f λ OR
330 m/s = f x 0.10 m
Vibrating particles move back and forth along the direction of the wave velocity
Parts consist of compressions and rarefactions
Ex. Sound Waves
Sound is produced when a compression is made.
It requires a producer and a medium to travel through.
The more elastic the object, the faster sound travels.
32 One tuning fork is struck and placed next to an identical fork. The two forks do not touch. The second tuning fork starts to vibrate because of —
G the Doppler effect
J standing waves
Resonance is the vibration of another object struck by a wave of the correct frequency. Since the forks are identical, the second one receives the correct frequency to begin vibrating.