EM Spectrum Notes

Question 1

Transverse waves produced by the motion of electrically charged particles. They do not need a medium to transfer energy. They travel through a vacuum at 300,000 km/ sec. (Speed of light)

Answer 1

Electromagnetic wave

Question 2

The transfer of energy by electromagnetic waves

Answer 2

Radiation

Question 3

The classification of electromagnetic waves by their wavelength or frequency

Answer 3

Electromagnetic Spectrum

Question 4

The Electromagnetic waves with the longest wavelength and lowest frequency. Some uses are radio, TV, studying space, and cordless phones. Radio station numbers are their frequencies. (98.7 The Beast) Frequencies are

Answer 4

Radio Wave

Question 5

The electromagnetic wave energy with frequencies between 3x10^9-3x10^3 Hz. Some uses of microwaves are microwave ovens, cell phones, GPS, radar, and satellite communication.

Answer 5

Microwave

Question 6

The EM wave energy w/ frequencies between 3 x 10^12 - 4.3 x 10^14 Hz. Some uses are cooking, thermal imaging, fiber optics, remote controls, short range communication, and security systems.

Answer 6

Infrared

Question 7

The EM wave energy with frequencies between 4.3 x 10^14 - 10^14 Hz. Some uses of -blank- are vision, illumination, and photography. From lowest to highest the colors of the -blank- spectrum are red, orange, yellow, green, blue, indigo*, and violet.

Answer 7

Visible Light

Question 8

The EM wave with frequencies between 7.5 x 10^14 - 3 x 10^17 Hz. Some uses of -blank- light are security markings, disinfectant, and fluorescent lights. -blank- light causes sunburns.

Answer 8

Ultra Violet

Question 9

The EM wave with frequencies between 3 x 10^17 - 3 x 10^19 Hz. Some uses of -blank- are medical -blank-, airport security and observing the internal structure of objects. -blank- damage cells, cause cell mutation and/ or cell death.

Answer 9

X-Ray

Question 10

EM wave given off by a radioactive atomic nucleus. They have very short wavelength, very high frequency, high energy, and are very penetrating. The EM wave with frequencies > 3 x 10^19 . Some uses of -blank- radiation are sterilizing food and medical equipment, and cancer treatment. -blank- rays damage cells, cause cell mutation, and/or cell death.

Answer 10

Gamma

Question 11

The passage of an EM wave through a medium

Answer 11

Transmission

Question 12

Disappearance of an EM wave into a medium

Answer 12

Absorption

Question 13

The spreading out of light rays in all directions as particles reflect and absorb

Answer 13

Scattering

Question 14

Materials that can be seen through because they allow nearly all light to pass through it. Ex. Air, clear glass

Answer 14

Transparent

Question 15

Materials that transmit some light to pass through but not enough for a clear image

Answer 15

Translucent

Question 16

Materials that don’t allow any light to pass through. You cannot see through -blank- materials

Answer 16

Opaque

Question 17

A way of filtering light so that all the waves vibrate in the same direction

Answer 17

Polarization

Question 18

A tool that uses refraction to separate white light into the colors of the visible light spectrum. (Red, orange, yellow, green, blue, indigo, violet)

Answer 18

Prism

Question 19

An object has the color of the -blank-. It absorbs all other colors. A material that reflects all the wavelengths of visible light appears white. A material that absorbs all wavelengths of visible light appears black.

Answer 19

Wavelength it reflects

Question 20

The study of light, vision, and related tech.

Answer 20

Optics

Question 21

Picture of an object formed by waves of light

Answer 21

Image

Question 22

The angle that light strikes a surface (angle of incidence, i) equals the angle that it reflects off the surface (angle of reflection, r)

Answer 22

Law of Reflection

Question 23

The point at which a parallel light wave reflects from a concave mirror or a convex lens and comes together

Answer 23

Focal point

Question 24

Distance from the center of the lens or mirror to its focal point.

Answer 24

Focal length

Question 25

A mirror whose surface curves inward producing a reflected image is enlarged.

Answer 25

Concave mirror

Question 26

A lens that is thinner in the middle and thicker at the edges, t curves heard and causes a inverted image past its focal point. The virtual image is upright and smaller than the actual object.

Answer 26

Concave lens

Question 27

A mirror with a surface that curves outward.

Answer 27

Convex mirror

Question 28

A lens that is thicker in the. Middle than the edges. The image will be inverted as the. Light rays pass the focal point.

Answer 28

Convex lens

Question 29

A mirror with a flat surface

Answer 29

Plane mirror

Question 30

Transparent optical tool that refracts light.

Answer 30

Lens