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
An object that is ____________ cannot be seen through.
What is opaque?
The human version of echolocation is called _______.
What is SONAR?
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
AM is short for __
What is amplitude modulation
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 one object vibrates at the same natural frequency of a second object and forces that second object into vibrational motion
What is resonance
TIC stands for ___ and detects __ on the electromagnetic spectrum
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.
When light rays come together.
What is converge?
The term for what a bat uses to find its food
What is echolocation
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
The highest pitched sound a human can hear.
about 20 kHz
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 color of a red apple behind a blue filter.
What is black?