Topic 3 lesson 1
A_______ is a disturbance that carries energy and travels in a repeating pattern.
Wave
_______ is the top point of a transverse wave.
Crest
A________ is the amount it time it takes for a wave to complete one back-and-forth motion.
Wave period
A ________ is a line of energy that continues in one direction until it hits an object.
Ray
_________receives the image from the lens and sends electrical messages about light to your brain to be decoded.
Retina
________ is the greatest height of a wave from its resting position.
Amplitude
_________ is the bottom point of a transverse wave.
Trough
Appear means.....
Show up
When rays ________, or bounce, off of a surface , they move in a new direction.
Reflect
__________bends and focuses light into images you can see.
Lens
__________ is the distance between similar points of a wave.
Wavelength
Name two patterns of waves
Transverse and longitudinal
_________ are caused by a disturbance at a single point.
Circular waves
Light rays bend, or ________ when they enter a new medium.
Refract
________connects the eye to the brain.
Optic nerve
___________ is the number of wave repetitions in a certain amount of time.
Frequency
A _________ wave is one that moves in the same direction as the particles.
Longitudinal
A_______ is a wave that is made when a line of matter is disturbed. They move in parallel lines.
Plane wave
To_________ means “to take in”.
Absorb
Have longer wavelengths, are used to heat food.
Microwave rays
A ___________ is a wave that moves perpendicular to the direction of the particles.
Transverse
What does the word transfer mean?
To relocate
There is a ___________ when more than one wave moves through a medium , they can meet.
Superposition
_______is the black hole in the center of the eye that lets light in. It moves to let more or less light in.
Pupil
Have a very short wavelength, they are used to photograph bones.
X ray waves