Waves

Question 1

number of waves produced by a source per unit time

Answer 1

frequency

Question 2

cycles per second

Answer 2

frequency

Question 3

Hertz or Hz

Answer 3

frequency

Question 4

wavelength

Answer 4

distance between two successive points in phase with each other

Question 5

Meter or M

Answer 5

wavelength

Question 6

vector quantity of a wave

Answer 6

velocity

Question 7

fill in the blanks: All EM waves are propagated with same speed equal to ——

Answer 7

3.0 x 10 (raise to 8) meters per second

Question 8

consists of magnitude and direction

Answer 8

velocity

Question 9

displacement travelled by the wave per unit time

Answer 9

velocity

Question 10

Meters per second (m/s)

Answer 10

velocity

Question 11

symbol of wavelength

Answer 11

lambda

Question 12

fill in the blanks: All nonzero digits are ———

Answer 12

significant

Question 13

fill in the blanks: —— between nonzero digits are significant

Answer 13

zeros

Question 14

fill in the blanks: Zeros at the —— of a measurement are never significant

Answer 14

beginning

Question 15

fill in the blanks: Zeros at the end of a measurement are significant if they contain a ——– ——

Answer 15

decimal point

Question 16

fill in the blanks: A — on top of a zero makes it significant

Answer 16

bar

Question 17

disturbance in a medium

Answer 17

wave

Question 18

fill in the blanks: For addition and subtraction, the —- —- determine the final answer

Answer 18

place values

Question 19

fill in the blanks: For multiplication and division, the number of ———– —— determine the final answer

Answer 19

significant digits

Question 20

shorten expressions of very large or very small measurements

Answer 20

scientific notations

Question 21

fill in the blanks: If the quantity is very small and you want to express it in scientific notation, the exponent is a ——– number

Answer 21

negative

Question 22

fill in the blanks: If the quantity is very big and you want to express it in scientific notation, the exponent is a ——– number

Answer 22

positive

Question 23

fill in the blanks: The first coefficient in a scientific notation comes ———- - — –.

Answer 23

between 1 and 10

Question 24

What letter represents Planck’s constant?

Answer 24

h

Question 25

What is the expression for h?

Answer 25

6.63 x 10 (raise to -34) J s

Question 26

What does J mean?

Answer 26

joules

Question 27

highest point in a transverse wave

Answer 27

crest

Question 28

lowest point in a transverse wave

Answer 28

trough

Question 29

two types of waves

Answer 29

mechanical | electromagnetic

Question 30

fill in the blanks: Mechanical waves are further classified based on the --------- -- ---------.

Answer 30

direction of vibration

Question 31

direction of vibration is perpendicular to the direction of propagation

Answer 31

transverse

Question 32

direction of vibration is parallel to the direction of propagation

Answer 32

longitudinal

Question 33

high density of particles in a longitudinal wave

Answer 33

compression

Question 34

low density of particles in a longitudinal wave

Answer 34

rarefaction

Question 35

transverse seismic waves

Answer 35

S waves

Question 36

longitudinal seismic waves

Answer 36

P waves

Question 37

type of transverse wave that can propagate through a vacuum (or air)

Answer 37

electromagnetic waves

Question 38

fill in the blanks: Electromagnetic waves are further classified based on their ------ ------------.

Answer 38

varied frequencies

Question 39

What does it mean when two successive points in a wave are in phase with each other?

Answer 39

They have the same mode of vibration or position. | They follow one another.

Question 40

Refers to how fast the wave is propagated and in what direction the propagation is

Answer 40

velocity

Question 41

fill in the blanks: Waves with ------ frequencies have short ------------

Answer 41

high, wavelengths

Question 42

fill in the blanks: Waves with low frequencies have ---- ------------

Answer 42

long wavelengths

Question 43

fill in the blanks: Having the same velocity, an EM wave with ---- frequency has short ---------- and vice versa

Answer 43

high, wavelength

Question 44

type of an EM wave with very high frequency or ultra high frequency

Answer 44

radio waves

Question 45

equal to 3.0 x 10 (raise to 8) m/s for EM waves

Answer 45

velocity

Question 46

region in the EM spectrum with the longest wavelength and lowest frequency

Answer 46

radio wave

Question 47

extraterrestrial sources of radio waves

Answer 47

Sun and Jupiter

Question 48

EM waves easily absorbed by water molecules thus used in cooking or heating food

Answer 48

microwaves

Question 49

EM waves sensed in the form of heat

Answer 49

infrared

Question 50

EM wave that can be separated into its component colors

Answer 50

visible light

Question 51

only part of the spectrum visible to the naked eye

Answer 51

visible light

Question 52

fill in the blanks: Too much exposure to -------------- rays can cause skin cancer and damage to retina

Answer 52

ultraviolet

Question 53

EM waves that could cause cataracts with prolonged exposure

Answer 53

microwaves

Question 54

also known as Roentgen rays

Answer 54

x-ray

Question 55

two types of x-ray

Answer 55

soft x-ray | hard x-ray

Question 56

region in the EM spectrum used for destroying cancer cells through radiotherapy

Answer 56

gamma rays

Question 57

EM wave that can cause cancer and mutation

Answer 57

gamma ray

Question 58

EM waves emitted by radioactive materials

Answer 58

gamma rays

Question 59

What radioactive materials are present in gamma rays?

Answer 59

Cobalt-60 | Cesium 137

Question 60

True or False: No single particle or object moved the entire distance of a wave. Only the energy is being transferred in a wave.

Answer 60

True

Question 61

property proportional to the frequency of EM waves

Answer 61

energy

Question 62

visible light with 760 nm

Answer 62

red

Question 63

visible light with 610 nm

Answer 63

orange

Question 64

visible light with 590 nm

Answer 64

yellow

Question 65

visible light with 550 nm

Answer 65

green

Question 66

visible light with 470 nm

Answer 66

blue

Question 67

visible light with 410 nm

Answer 67

violet

Question 68

energy transported per unit time and per unit area

Answer 68

wave intensity

Question 69

Watt/m (raise to 2)

Answer 69

wave intensity

Question 70

power delivered per unit area

Answer 70

wave intensity

Question 71

True or False: Many properties can be observed in both transverse or longitudinal waves. Some are exclusive for one type of wave only.

Answer 71

True

Question 72

The significand, the significant digits of a number in scientific notation or a floating-point number ‎

Answer 72

mantissa