Electromagnetic Spectrum, quest

Identify the 7 main kinds of electromagnetic waves in order from lowest frequency to highest frequency.

The 7 main electromagnetic waves in order from lowest frequency to highest frequency: 1. radio waves 2. microwaves 3. infrared waves 4. light 5. ultraviolet waves (rays) 6. x-rays 7. gamma rays

When we see the color of an object, what are we seeing?

The color that is reflected off the object

Order of EM waves ... Longest to shortest #4

Visible

Which part of the EM spectrum can be seen with our eyes?

Visible light is a narrow portion of the spectrum

A green object is appears green because it ______ all colors except green

absorbs

How are radio waves used?

are used in television and radio broadcasting

How are ultraviolet rays helpful?

can be used to sterilize equipment (kill bacteria and other disease-causing organisms). also stimulate skin cells to produce Vit D, which is needed for the absorption of calcium by the body

How are ultraviolet waves dangerous?

cause sunburn, premature aging (wrinkles), increase the risk of skin cancer, weaken the immune system and harm our eyes.

Order of EM waves ... Longest to shortest #2

Microwave

What type of EM wave is given off by all objects?

All objects give off varying amounts of infrared radiation (which is detected as heat)

Each element gives off a unique set of wavelengths, like fingerprints that is called

Emissions spectrum

Order of EM waves ... Longest to shortest #7

Gamma

Describe the characteristics of x-rays. Include how they can be helpful & harmful.

Have a lower frequency than gamma rays but a higher frequency than ultraviolet waves. Helpful: used to see inside the bodies of living things or objects (ex: airport luggage) Harmful: damages healthy cells of an organism (a living thing)

What is the relationship between frequency and wavelength?

High frequency waves have short wavelength. Low frequency waves have long wavelengths.

As sounds get closer....the pitch gets

Higher

Which color of visible light has the highest frequency? Which has the lowest frequency?

Highest frequency - violet Lowest frequency -red

Order of EM waves ... Longest to shortest #3

Infrared

List the types of waves

Longitudinal, Transverse, Surface

Waves that travel through matter or medium

Mechanical Waves

Which EM wave has a frequency just higher than radio waves? How are these waves used?

Microwaves are high frequency radio waves. Microwaves are used to cook food and are used in RADAR technology.

Antinodes

Peak or trough of wave

Order of EM waves ... Longest to shortest #1

Radio

Which EM wave has the lowest frequency and longest wavelength?

Radio waves

In a prism, what light bends the least

Red

What are the primary colors

Red, Green, Blue

Identify the colors of visible light.

Red, orange, yellow, green, blue, indigo, violet

What medium does sound waves moves fastest through?

Solid

Optical Illusion

Something that deceives the eye

Waves that travel both parallel and perpendicular in direction

Surface waves

Order of EM waves ... Longest to shortest #5

Ultraviolet

What medium does electromagnetic waves moves fastest through?

Vacuum of Space

In a prism, what light bends the most

Violet

When you combine all colors of light you get ....

White

Order of EM waves ... Longest to shortest #6

X-ray

Describe the characteristics of gamma waves. Include how they are helpful & harmful.

have the highest frequency, shortest wavelength and therefore, carry the greatest amount of energy. -Source: certain radioactive elements & nuclear reactions -Helpful: used to kill cancer cells - Harmful: can alter or kill healthy body cells

trough

is the bottom of a wave.

wavelength

is the distance between one point of a wave to the same point in the next wave.

amplitude

is the maximum distance that matter is displaced from the resting position.

frequancy

is the number of waves per unit of time.

crest

is the top of a wave.

Nodes waves

point where waves meet at sea level

What is an electromagnetic wave?

wave that can travel through space (a vacuum) or through matter (a medium)

infrared

waves are often used in heat lamps.

electromagnetic

waves are produced by stars and galaxies.

radio

waves are transverse waves that disturb electromagnetic fields.

x-rays

waves are used to penetrate solids and are used in doctors offices and as airports.

ultraviolet

waves are utilized by insects to locate nectar

mechanical

waves disturb matter.

visible light

waves have a color spectrum known as ROYGBIV.

gamma

waves have the shortest wavelength and the hightest frequency.

longitudinal

waves occur when the medium is parallel to the distance of the wave.

transverse

waves occur when the motion of the medium is at right angles(perpendicular) to the direction of the wave.