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Light and Waves

Test review- Unit 2, Light and Waves

QuestionAnswer
What does a wave transfer? A wave transfers energy from one place to another.
Many waves travel by disturbing a material. What is this material called? This material is called a medium.
Fill in the blank: _____________from the sun transfer energy to Earth across an ________________ Light waves from the sun transfer energy to Earth across an empty space.
Fill in the blank: Waves can be classified by comparing the _____________that they cause particles in the medium to move. Waves can be classified by comparing the direction that they cause particles in the medium to move.
This type of wave causes particles move back and forth in the same direction that the wave travels. Sound waves are an example of this. In longitudinal waves particles move back and forth in the same direction that the wave travels. Sound waves are an example of this.
This type of wave causes the particles move up and down as the wave passes. Ocean waves are an example of this. In transverse waves the particles move up and down as the wave passes. Ocean waves are an example of this.
Fill in the blank: Transverse waves and longitudinal waves often travel at _______________________ in a medium. Transverse waves and longitudinal waves often travel at different speeds in a medium.
What type of wave requires a medium in order to travel? Waves that require a medium are called mechanical waves. They can’t travel without a medium.
Fill in the blank: Waves travel at different_______________ in different ______________ Sound waves travel much faster in a liquid or solid than in air. Waves travel at different speeds in different mediums. Sound waves travel much faster in a liquid or solid than in air.
What type of wave travels without a medium? Electromagnetic waves travel without a medium, they are disturbances in the electromagnetic field. Examples include light, radio waves, and x-rays.
Any material that lets light pass, or transmit straight through, is ______________________ Transparent
Any material that lets light pass, or transmit through it, but scatters the light in many directions is _________________ Translucent
Any material that absorbs or reflects light instead of transmitting it is ____________ Opaque
When light changes direction as it transmits through matter, this is called __________________. A prism is an example of this. Refraction
_____________ occurs when light bounces off an opaque material. This is one thing that allows us to see objects' colors. Reflection
__________________ occurs when light waves are sent in many directions, often when passing through a translucent medium. Scattering
________________ light is a mixture of all the visible light spectrum's colors. White
A ____________ object absorbs almost all the light that hits it. Black
Light's speed will (speed up/slow down/stay the same) when it moves from empty space to a medium. Slow Down
If you look at a transparent stained glass window and the window appears green, what color light is being transmitted? Green light
If you look at a translucent glass bottle and the bottle appears blue, what colors of light are being absorbed? Red, orange, yellow, green, and violet
If you look at a yellow lemon, what color is being reflected into your eyes? Yellow
If you look at an orange traffic cone, what colors are being absorbed by the cone? Red, yellow, green, blue, violet
Mechanical waves travel most quickly through a (solid/liquid/gas) medium. Solid
List each type of Electromagnetic wave from HIGHEST frequency to LOWEST frequency. Gamma Ray, X-Ray, Ultraviolet Ray, Visible Light, Infrared, Microwave, Radio Wave
Sunlight is an electromagnetic wave. How does it transfer its energy to earth? As radiation through empty space
The top of a wave is known as its ___________ Crest
The low point of a wave is known as its ______________ Trough
The "height" of a wave, or the distances it moves particles from their resting position, is known as its ______________- Amplitude