PHU 4

Question 1

transverse wave

Answer 1

The direction in which the wave travels is perpendicular to the direction of the disturbance.

Question 2

longitudinal wave

Answer 2

A wave in which the vibration of the medium is parallel to the direction the wave travels

Question 3

wave

Answer 3

a vibration that causes a transfer of energy from one place to another.

Question 4

medium

Answer 4

Material through which a wave travels (ground, air). when a wave travels through a medium it does not go anywhere it is just temporarily displaced.

Question 5

mechanical wave

Answer 5

a type of wave that involves moving parts or pieces. the medium is physically displaces temporarily as a the wave travels through.

Question 6

lowest to highest frequency

Answer 6

radio, microwave, infrared, visible, ultraviolet, x-ray, gamma

Question 7

what can cause cancer

Answer 7

UV, Xray, Gamma

Question 8

reflection

Answer 8

when a wave reaches a boundary between two media and some of the energy returns back to the first medium.

Question 9

specular reflection

Answer 9

a reflection produced by a smooth surface in which parallel light rays are reflected in parallel (water, polished silver, mirror)

Question 10

diffuse reflection

Answer 10

Reflection that occurs when parallel rays of light hit a rough surface and all reflect at different angles (shirt, paper)

Question 11

Reverberation

Answer 11

reflections in a smaller area (sound in a classroom)

Question 12

echo

Answer 12

reflects off a surface that is far away (building) delayed

Question 13

refraction

Answer 13

when a wave changes directions as it passes from one medium to another. occurs from change in wave speed. (ex- heat shimmer)

Question 14

Atmosphere Refraction

Answer 14

sunlight refracts as it passes through the atmosphere. as light enters the atmosphere it slows down.

Question 15

prism

Answer 15

A piece of glass that seperates white light into colors of the spectrum.

Question 16

diffraction

Answer 16

when a wave changes direction as it passes around the edges of a gap or barrier (water, sound, light)

Question 17

interference

Answer 17

when two or more waves occupy the same space at the same time, they add together to make a bigger wave or they cancel to make a smaller wave.

Question 18

superposition

Answer 18

when two or more waves occupy the same space at the same time

Question 19

constructive interference

Answer 19

The interference that occurs when two waves combine to make a wave with a larger amplitude

Question 20

destructive interference

Answer 20

The interference that occurs when two waves combine to make a wave with a smaller amplitude

Question 21

destructive examples

Answer 21

• noise cancelling headphones
  -corners of a tuning fork

Question 22

resonance

Answer 22

A phenomenon that occurs when two objects naturally vibrate at the same frequency.

Question 23

double slit experiment

Answer 23

demonstrates that light has properties of both waves and matter

Question 24

magnetic field

Answer 24

region of space where a magnetic force can be felt

Question 25

Relationship between magnetic and electric

Answer 25

An electric field creates a magnetic field (vise versa)

Question 26

Relationship between magnetic and electric

Answer 26

An electric field creates a magnetic field (vice versa)

Question 27

how do we break down light with a spectrum

Answer 27

with a prism, double slit experiment (if we shine light through slits you will see light and dark spots on the wall because the light diffracts).

Question 28

dark spots

Answer 28

nodal points where light from 2 slits interfere destructively.

Question 29

bright spots

Answer 29

antipodal points where light from 2 slits interfere constructively.

Question 30

Multiple slit grating

Answer 30

bright spots are spread out, 2 areas of destructive interference are larger

Question 31

diffraction grating

Answer 31

a device made of thousands of closely spaced slits through which light is passed in order to produce a spectrum

Question 32

wave equation

Answer 32

V=F*Lambda (wavelength)

Question 33

are sound waves longitudinal or transverse

Answer 33

longitudinal

Question 34

are sound waves mechanical or nonmechanical

Answer 34

mechanical

Question 35

water wave

Answer 35

mechanical transverse

Question 36

slinky wave

Answer 36

mechanical, transverse, longitudinal

Question 37

sound wave

Answer 37

mechanical longitudinal

Question 38

light wave

Answer 38

electromagnetic transverse

Question 39

Mechanical wave

Answer 39

require a medium in order to transport their energy from one location to another.

Question 40

electromagnetic waves

Answer 40

waves that are created as a result of vibrations between an electric field and a magnetic field.

Question 41

longitudinal wave

Answer 41

a type of wave that travels in the direction of the medium

Question 42

Transverse wave

Answer 42

a wave vibrating at right angles to the direction of its propagation