EM Spectrum
An Electromagnetic wave travels fastest in a _______.
Gas or a vacuum where there are no atoms to slow it down.
Sound travels fastest in a _______ (solid, liquid, gas, vacuum)
SOLID
When waves bounce off of an object
What is reflection
The period of a sound wave is 0.002 seconds. The speed of sound is 344 m/s. Find the frequency.
500 Hz
Explain the law of reflection
The angle of incidence is always equal to the angle of reflection.
How is the energy on the EM spectrum organized? From ______ to ______
longest wavelength to shortest; from slowest to fastest
A wave travels 1.5 m/s with a frequency of 0.45 Hz. What is the wavelength of the wave?
3.33 m
When a wave hits an object and then goes around the object, it is ________________.
What is diffracted
When two or more waves combine to form a new wave.
What is interference
The only part of the EM spectrum we see is _______________.
Visible Light
What color of light has the longest wavelength (least amount of energy)?
Red
The type of wave that makes up sound waves
What is longitudinal or compressional
The bending of waves caused by a change in its speed as it moves from one medium through another.
What is refraction
Electric and magnetic waves released by a vibrating electric charge, capable of transferring energy through a vacuum.
What is electromagnetic waves
What is the order of colors in the visible light spectrum?
ROYGBIV
What is the most dangerous part of the EM spectrum that can harm us?
Gamma Rays
Why can't sound travel in space or a vacuum?
It needs a medium
MRI machines use what kind of wave
What is radio waves
What is a photon?
A massless bundle of energy.
We see different colors because our rods pick up the different wavelengths that are ___ from an object...
What is reflected
All colors of light hit the object and are absorbed except the color we see, which reflects and goes into our eye.
The speed of a wave is measured by how close the crests are or _________ measured in Hz.
Frequency
Which of the following sounds would have the shortest wavelength?
A. Thunder at 75 Hz
B. A soprano singer at 2,000 Hz
C. A man’s voice at 500 Hz
B. A soprano singer at 2,000 Hz
What kind of wave has energy that is perpendicular to the motion of the matter.
What is transverse
The range of all electromagnetic frequencies
What is the electromagnetic spectrum
The three bones of the middle ear
What is hammer (malleus), anvil (incus), and stirrup (stapes)