5th Grade Light Notes Flashcards
The high point of a wave is called the _______or the_______
Peak or the crest
The low point of a wave is called the
Trough
Waves can be measured in
Wavelengths
A wavelength is the difference between____ _____ _____(crest) to the next______ _______(crest) or from one _______ to the next_________
One wave peak
Wave peak
Trough
Trough
Light has properties of both a_______and a________
Wave and a particle
Recent theory identifies light as a small particle called a
Photon
A photon moves in a______line
Straight
In both the light wave and the photon descriptions, light is______
Energy
Because light has both electric and magnetic fields, it is referred to as
Electromagnetic radiation
Light waves move as______ ______and travel through a vacuum at a speed of approximately_______miles per second.
Transverse waves
186,000
Compared to sound, light travels extremely_____
Fast
It takes light from the sub less than_______minutes to travel 93 million miles to reach earth.
8 1/2
Unlike sound, light waves travel in a straight path called______and do not need a medium through which to move.
Rays
A ray is the straight line that represents the____of_____.
Path of light
A beam is a group of________rays
Parallel
Light waves are characterized by their_________and the frequency of their wavelengths.
Wavelengths
The size of a wave is measured as its________,which is the distance between two corresponding points on successive waves, usually crest to crest or trough go trough. The wavelength can be measured from any point on a wave as long a sit is measured to the same point on the next wave.
Wavelength
________is the number of waves passing a given point every second. The greater the_______,the greater the amount of energy.
Frequency
Light waves are waves of______. The amount of energy in a light wave is proportionally related to its frequency.
Energy
High frequency light has_____ ______, low frequency light has_____ ______.
High energy
Low energy
The move wavelengths in a light wave in a given period of time, the______the energy level.
Higher
_______rays have the most energy. And ______waves have the least.
Gamma
Radio
Of visible light,_____has the most energy and____the least.
Violet
Red
The number of vibrations in a given time is called the_______
Frequency
When a light wave hits an object it will either bounce off, called_______,bend, called_______, pass through called_______or be absorbed as heat.
Reflection
Refraction
Transmitted
Some objects transmit light waves better than others._______materials do not allow light waves to pass through. Reynolds wrap is an example.
Opaque
_______materials allow light to pass through but not in a straight path. Wax paper is an example of this.
These material allow light waves to pass through easily.
Translucent
Light waves are extremely fast. It only takes a light wave eight and 1/2 minutes to travel 150 million kilometers from the sun to the earth. In addition to being fast, these waves are also very______. Amazingly enough, our eyes can see them. We call these visible waves the visible_____
Small
Spectrum
We can see many different waves in this visible spectrum. Each of these visible waves is a different wavelength and our eye sees each one as a different color. The longest wave that we can see is called the color_____. The shortest wave that we can see is called the color_____.
Red
Violet
The waves that make up the visible spectrum are_____,______,______,______,_____,______,and _____.
Red Orange Yellow Green Blue Indigo Violet
To see the different colors that make up white light, we need to use a_____
Prism
When white light passes through a glass prism, it_____and changes direction. This bending of light is called a_______. Each of these waves in the visible spectrum bends differently, so we see different colors.
Bends
Refraction
A small particle
Photon
The high part of the peak
Crest
The low point
Trough
A measurement of a wave
Wavelength
To travel in a straight path
Ray
A group of parallel Rays
Beam
The number of vibrations in a given time
Frequency
Not that much energy
Low frequency
The greater the frequency the more energy
High frequency
Light bounces off
Reflection
Light is bending
Refraction
To pass through or be absorbed by heat
Transmitted
Materials that do not allow light waves to pass through
Opaque
Materials let light to pass through but not in a straight path
Translucent
Materials allow light waves to pass through easily
Transparent
Each visible wave is a different wavelength
Visible spectrum
We need this to see different colors
Prism
What colors are not spectral colors
Black
White
Black is a total absence of_______light
Reflected
_____is a reflection of all visible light together.
White
The term______light refers to light waves that are neither transmitted nor absorbed, but are thrown back from the surface of the medium they encounter.
Reflected
If the surface of the medium contacted by the wave is smooth and polished(mirror), each reflected wave will be reflected_____ at the same angle as the incident wave. The wave that strikes the surface of the medium(mirror) is called the ______wave, and the one that bounces back is called the______wave.
Back
Incident
Reflected
The bending of a wave resulting from a change in its velocity(speed) as it moves from one medium to another(light moving from the air into water). The frequency of the wave does not change.
Refraction
The amount of bending of the light wave(refraction) depends on
The density of the material
The wavelength of the light wave
The angle at which the original light wave enters the new medium
Some examples of refraction are when
Refraction causes a setting sun to look flat
A spoon appears to bend when it is immersed in a cup of water
Two kinds of waves that impact our lives everyday
Light waves and sound waves
