Term
| How are electromagnetic waves different from mechanical waves? |
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Definition
They are different from mechanical waves in how they are produced and how they travel. 1. They are produced by electric and magnetic fields. 2. they can travel WITHOUT a medium |
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Term
| What is the maximum speed of light? |
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Definition
sometimes called c 3.00 x 108 m/s in a vacuum |
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Term
| How do electromagnetic waves differ from one another? |
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Definition
They vary in wavelength and frequency. |
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Term
| What is the dual nature of electromagnetic radiation? |
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Definition
The idea that waves sometimes act live waves and at other times act like a stream of particles. |
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Term
| What happens as light travels farther from its source? |
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Definition
| The intensity of the light decreases the farther you are from the source. |
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Term
| What is an electromagnetic wave? |
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Definition
| a transverse wave consisting of changing electric and changing magnetic fields |
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Term
| What is an electric field? |
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Definition
| a field in a region of space that exerts electric forces on charged particles; a field produced by electric charges or by changing magnetic fields |
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Term
| What is a magnetic field? |
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Definition
| a region of space that produces magnetic forces. |
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Term
| How are electromagnetic waves produced? |
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Definition
| Electromagnetic waves are produced when an electric charge vibrates or accelerates |
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Term
| Do electromagnetic waves travel through a medium? |
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Definition
| They can but a medium is not required. |
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Term
| What is electromagnetic radiation? |
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Definition
| the transfer of energy by electromagnetic waves travelling trhough matter or a cross space |
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Term
The following description describes: E. Electromagnetic waves M. Mechanical waves B. Both types of waves Travels through a vacuum. |
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Definition
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Term
The following description describes: E. Electromagnetic waves M. Mechanical waves B. Both types of waves Travels through a medium. |
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Definition
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Term
The following description describes: E. Electromagnetic waves M. Mechanical waves B. Both types of waves Fits a wave model |
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Definition
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Term
The following description describes: E. Electromagnetic waves M. Mechanical waves B. Both types of waves Fits a particle model |
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Definition
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Term
The following description describes: E. Electromagnetic waves M. Mechanical waves B. Both types of waves transverse waves |
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Definition
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Term
The following description describes: E. Electromagnetic waves M. Mechanical waves B. Both types of waves longitudinal wave |
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Definition
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Term
| How can you tell that electromagnetic waves are transverse waves? |
| | A. | They consist of two fields. | | | B. | They carry energy. | | [image] | C. | Their two fields are at right angles to each other. | | | D. | Their fields are at right angles to the wave's direction. |
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Definition
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Term
| Because light travels so quickly, you must have it travel ____ to measure its speed. |
| A. | | less than 1 km | | B. | | at least 1 km | | C. | | at least 10 km | | D. | | much farther than 10 km |
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Definition
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Term
| A global positioning satellite transmits a radio wave with a wavelength of 19cm. What is the frequency of the radio wave? |
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Definition
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Term
| The radio waves of a particular AM radio station vibrate 680,000 times per second. What is the wavelength of the wave? |
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Definition
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Term
| Radio waves that vibrate 160,000,000 times per second are used on some train lines for communications. If radio waves that vibrate half as many times per second were used instead, how would the wavelength change? |
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Definition
| wavelength would be 1.9 meters longer. |
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Term
| What is the evidence that light travels like a wave? |
| A. | | Light carries energy. | | B. | | Light can be deflected. | | C. | | Light can cause the photoelectric effect. | | D. | | Interference only occurs with waves. |
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Definition
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Term
| What is the photoelectric effect ? |
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Definition
| The emission of electrons from a metal caused by light striking the metal. |
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Term
| How does a can of spray paint help you model a change in light intensity? |
| A. | | As the can moves farther from the surface, the area the paint covers becomes larger and more intense. | | B. | | As the can moves farther from the surface, the area the paint covers becomes smaller, but more intense. | | C. | | As the can moves farther from the surface, the area the paint covers becomes larger, but less intense. | | D. | | The can sprays paint in the form of a circle. |
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Definition
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Term
| What waves are included in the electromagnetic spectrum? (name at least 6) |
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Definition
| The electromagnetic spectrum includes radio waves, infrared rays, visible light, ultraviolet rays, X-rays, and gamma rays. |
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Term
| What are the longest waves on the EM spectrum? |
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Definition
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Term
| What are the shortest waves on the EM spectrum? |
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Definition
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Term
| What waves on the EM spectrum have the highest frequency? |
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Definition
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Term
| What waves on the EM spectrum have the lowest frequency? |
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Definition
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Term
| Give 2 uses for radio waves: |
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Definition
Radio communications
TV communications
Microwaves (actually a type of radiowave)
Cell phones |
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Term
| Give two uses of infrared waves: |
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Definition
heat- to warm a bathroom or food in a kitchen
remote controls
detect heat (night vision goggles) |
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Term
| Give 2 uses for visible light: |
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Definition
Allows vision
Communications
Keep us safe |
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Term
| Give 2 uses for ultraviolet light: |
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Definition
to sterilize medical equipment
used in tanning beds
used in crime scenes |
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Term
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Definition
medical images
security scanning |
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Term
| Give 2 uses of gamma rays: |
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Definition
cancer treatment
industrial inspection
imaging of the body for medical purposes |
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Term
| What is the difference between the waves used for AM radio stations an the waves used for FM radio stations? |
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Definition
| AM stations code the information by changing or modulating the amplitude of the waves where FM waves code the information by modulating or changing the frequency of the wave |
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Term
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Definition
| An image that shows differences in heat of an object. |
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Term
| Which type of wave has more penetrating power an ultraviolet wave or a gamma wave? |
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Definition
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Term
| What three types of materials affect the behavior of light? |
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Definition
| opaque, transparent, and translucent |
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Term
| A material that absorbs all light or does not allow light to transmit is called |
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Definition
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Term
| An object transmit so that you can see through it clearly is known as |
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Definition
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Term
A material that transmit some light but scatters it so that the image is difficult to see is called
TOM ERNSTER #1 |
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Definition
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Term
Give an example of each of the following types of materials:
opaque
translucent
transparent |
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Definition
a window shade
the glass blocks in our classrooms
the glass in a window |
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Term
| What are the three behaviors of light waves? |
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Definition
| Light waves can be absorbed, transmitted, or reflected |
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Term
| If light is transmitted what are the three ways the light will behave? |
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Definition
| when transmitted light can be refracted, polarized, or scattered |
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Term
| What happens to the light waves when they are refracted? |
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Definition
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Term
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Definition
| a distorted image due to the speed at which light travels through different mediums |
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Term
| What happens to light that is polarized? |
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Definition
| The waves vibrate in only one plane instead of at right angles to each other |
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Term
| How does a prism create a rainbow? |
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Definition
| As the light passes through the prism the waves of visible light the different colors bed different amounts. |
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Term
| The process where light waves are bent as they pass through a prism is known as: |
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Definition
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Term
| What two things affect the color that an object appears? |
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Definition
1. The color of the light striking the object 2. the material the object is made of |
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Term
| What are the 3 primary colors of light? |
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Definition
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Term
| What are the 3 primary colors of pigments? |
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Definition
| cyan, magenta, and yellow |
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Term
| What color light do you produce if you combine the 3 primary colors of light? |
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Definition
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Term
| When all 3 primary pigments are combined what color is produced? |
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Definition
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Term
| If no light is reflected off of an object, what color would it appear? |
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Definition
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Term
| What is a secondary color? |
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Definition
| A secondary color is the color produced by mixing two primary colors. |
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Term
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Definition
| A material that will absorb certain colors of light and reflect other colors. |
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Term
| Draw and label the electromagnetic spectrum. Be sure to include all of the types of waves, how the frequency changes, and how the wavelength changes. |
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Definition
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Term
| T/F TOM ERNSTER IS THE COOLEST FRESHMAN EVER |
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Definition
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