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Electromagnetic Wave
Banister HT
| Question | Answer |
|---|---|
| How are waves created? | Waves are created when a source of energy (force) causes a vibration. |
| What is a vibration? | A vibration is a repeated back-and-forth or up-and-down motion. |
| Waves carry energy through _____ space or through a ____ without transporting matter. | empty / medium |
| All waves can transmit energy through a ____; Certain waves can also transmit energy through empty ________. | medium ./ space |
| Medium | a material through which waves can travel. (solid, liquid, or gas) |
| What is the only part of the electromagnetic spectrum that is visible to the human eye. | light waves |
| How is energy transferred in mechanical waves? | particles of the medium vibrate. |
| Examples of mechanical waves | water waves, earthquakes/seismic waves, sound waves, and waves that travel down a rope or spring |
| Definition of wave | a repeating disturbance or vibration that transfers or moves energy from place to place |
| Light waves | electromagnetic waves that can travel through matter or empty space where matter is not present |
| ______ waves, cannot be transferred or transmitted through empty space. (vacuum). | Sound |
| When waves interact, they superimpose upon or interfere with each other resulting in changes to the ______________. | amplitude |
| The place on the wave that is pushed together is call the _____________ and the place that is moving apart is the _________. | Compression / Rarefaction |
| Examples of mechanical compressional/longitudinal waves might include: ____________ and some ___________. | sound waves / seismic waves |
| Mechanical waves in which the particles of matter in the medium vibrate by moving back and forth and perpendicular (at right angles) to the direction the wave travels are called ____. | Transverse Waves |
| The highest point of a transverse wave is the ___. | crest |
| The lowest point of a transverse wave is the ___. | through |
| Mechanical waves in which the particles of matter in the medium vibrate by pushing together and moving apart parallel to the direction in which the wave travels are called ______ and _____. | compressional or longitudinal |
| Examples of mechanical transverse waves might include some waves in a _________, waves on a ______, ____ on a musical instrument, and some _______ waves. | slinky spring / rope / string / seismic |
| _____ waves are transverse waves that can travel without a medium through empty space. | Light waves |
| Define frequency | a measure of how many waves pass a point in a certain amount of time. |
| The higher the frequency, the _______ the waves are together and the greater the energy carried by the waves will be. | closer |
| The highest point of a transverse wave is the ____ and the lowest is the ___. | crest / through |
| Properioties of waves will be diagrammed using ______________ waves only. | transverse |
| Define speed | a measure of the distance a wave travels in an amount of time. |
| The _____________ of a wave is determined by the type of wave and the nature of the ___________. | speed / medium |
| As a wave enters a different _______, the wave's speed changes. | medium |
| Waves travel at different speeds in different _____. | media |
| All frequencies of ____________________ waves travel at the same speed in empty space. | electromagnetic |
| Define amplitude | a measure of the distance between a line through the middle of a wave and a crest or through |
| The greater the force that produces a wave, the greater the ___________ of the wave and the greater the energy carried by the wave. | amplitude |
| In a transverse wave the higher the wave, the higher the ________. | amplitude |
| Sounds with greater amplitude will be ______. | louder |
| Light with greater amplitude will be ______. | brighter |
| Define wavelength | a measure of the distance from the crest of one wave to the crest on the very next wave. |
| Shorter wavelengths are included by the _________. | frequency |
| A higher frequency causes a shorter _____________ and greater ____________. | wavelength / energy |
| Define refraction | the bending of waves caused by a change in their speed as they pass from one medium to another |
| Define reflection | the bouncing back of a wave when it meets a surface or boundary that does not absorb the entire wave's energy. |
| When do transmissions of waves occur? | when waves pass through a given point or medium |
| ______ of certain frequencies of light occurs when the energy is not transferred through, or reflected by, the given medium. | Absorption |
| _______ materials allow no light waves to be transmitted through them. | Opaque |
| _______ materials transmit some light, but cause it to be scattered so no clear image is seen. | Translucent |
| Objects or substances that __________ any wavelength of electromagnetic radiation become warmer and convert the absorbed energy to infrared radiation. | absorb |
| _____ types of waves are reflected. | All |
| Sound waves are _________ through solids, liquids, gases. | transmitted |
| Example of sound waves and purpose | echoes help bats and dolphins learn about their enviroment |
| ________________ or ___________________ separate white light into its different components or colors by bending the light at different angles depending on the frequencies of the light passing through them. | Prisms or diffraction grading |
| Different colors of light have different ___. | frequencies |
Created by:
JScarborough