Waves

Question 1

Threshold of Pain

Answer 1

sound at 120 dB

Question 2

Dual Nature

Answer 2

Light acts both as a wave and as a particle.

Question 3

Electron Transitions

Answer 3

when atoms absorb and release energy, electrons move from the ground state to higher orbitals and back again.
Ex: neon lights

Question 4

Mechanical Waves

Answer 4

Physical waves that travel through a medium.
Ex: sound and water waves

Question 5

Wave

Answer 5

a disturbance that transports energy as it moves through space and time

Question 6

Farsightedness

Answer 6

A vision problem in which a person cannot see nearby objects without correction.

Question 7

Diffuse Reflection

Answer 7

a reflection in which no image is seen
Ex: reflection from a wall

Question 8

Reflection (of Light)

Answer 8

The bouncing of light off of a surface
Ex: Light reflects off of a mirror

Question 9

Magnetic Poles

Answer 9

the north and south ends of a magnet

Question 10

Decibel

Answer 10

The unit for the loudness of sound and is abbreviated dB.

Question 11

Voltage / Potential Difference / Potential

Answer 11

Volts (V) are used to measure the difference in energy per charge between any two places in a circuit.

Question 12

Circuit Diagram / Schematic

Answer 12

a drawing that uses symbols to show how components should be connected in a circuit

Question 13

Amplitude

Answer 13

the most a particle of the medium can move during a vibration (measured from a point where the medium is not moving to one crest).

Question 14

Pitch

Answer 14

how high or low the sound seems to a human ear

Question 15

Resistance

Answer 15

A device that reduces/limits/controls the current in a circuit, measured in ohms (Ω).

Question 16

Short Circuit

Answer 16

a dangerous circuit in which a wire goes straight from one battery contact to the other.

Question 17

Wavelength

Answer 17

distance units used to measure the length of one full wave cycle in space.
Red is long. Violet is short

Question 18

Frequency

Answer 18

the number of times an action was seen over a certain amount of time
Red is low. Violet is high

Question 19

Threshold of Hearing

Answer 19

0 dB, the softest sound a human can hear

Question 20

Ion

Answer 20

an atom that has gained or lost an electron and now has a net electrical charge.

Question 21

Crests

Answer 21

the peaks, or highest points, of a vertically vibrating transverse wave

Question 22

Nearsightedness

Answer 22

A vision problem in which a person cannot see distant objects without correction because their eyeball is too long.

Question 23

Photon

Answer 23

a particle of light energy

Question 24

Period

Answer 24

the time it takes to complete one full wave cycle, measured in seconds

Question 25

Refraction (of Light)

Answer 25

The bending of a light ray's direction of travel as it goes from one material to another. Ex: A pencil looks bent when placed in water

Question 26

Medium

Answer 26

the material that carries a mechanical wave

Question 27

Visible Light

Answer 27

light with frequencies that humans can see Ex: Wavelengths: Red is long. Violet is short. Frequency: Red is low. Violet is high.

Question 28

Compound Microscope

Answer 28

Often employs two thick convex lenses to magnify very small objects.

Question 29

Troughs (of a Wave)

Answer 29

valleys are the lowest points of a horizontal wave that moves up and down.

Question 30

Transverse Wave

Answer 30

A wave in which the sound goes in the opposite direction of the way the energy moves. In a transverse wave, it's perpendicular

Question 31

Current

Answer 31

The flow rate of charge, measured in amps (A).

Question 32

Longitudinal Wave

Answer 32

a wave where the direction of the sound is the same as the way the energy moves. In a LONGitudinal wave, the vibration is ALONG with the motion

Question 33

Electromagnetic Spectrum

Answer 33

electromagnetic waves of all frequencies, from very long radio waves to very short gamma rays

Question 34

Ohms (Ω)

Answer 34

the unit for resistance

Question 35

Compression Wave

Answer 35

a wave that moves in one direction and has places of high and low pressure or density

Question 36

Magnetic Field

Answer 36

The magnetic force that could exist in the space around a magnet. Proportional to the force on a magnetic pole in the space around the magnet.

Question 37

Specular Reflection

Answer 37

a reflection that looks like the image Ex: mirrors

Question 38

Electromagnetic Waves

Answer 38

Waves are made up of electric and magnetic forces that move back and forth. Electromagnetic waves don't need a medium to move, so they can go through an empty space. All things with temperatures above absolute zero give off heat.

Question 39

Wave Speed

Answer 39

Tells how fast the wave energy moves from one place to another Wave speed =wavelength x frequency