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 _______ because of the INCREASED or DECREASED distance between the particles.
SOLID and DECREASED
When waves bounce off of an object
What is reflection
When heat or energy is transferred by two materials or objects touching it is called __________.
Conduction
The back of the eye where an image should be focused
What is the retina
How is the energy on the EM spectrum organized? From ______ to ______
longest wavelength to shortest; from slowest to fastest
What unit is the loudness of a sound measured in?
Decibels
When a wave hits an object and then goes around the object, it is ________________.
What is diffracted
EM waves are all these type
What are transverse waves:
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
when 2 waves combine and cancel out
What is distructive interference?
These waves require a medium. Give an examples.
What are mechanical waves? What s sound waves?
Our _________ vibrates first to allow the energy to pass on for us to hear.
Eardrum
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?
Sound must have atoms (especially gas atoms) in order to travel, and there are no atoms in a vacuum or space.
particles in this type of wave move back and forth
compressional/longitudinal
A wave hits a barrier at 60o. What angle is the reflection?
What is 60o?
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
As this increases, pitch increases
What is amplitude?
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
Name a part of the ear
What is hammer (malleus), anvil (incus), and stirrup (stapes)