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2nd Semi-Quarterly > Sci lesson 1 > Flashcards

Sci lesson 1 Flashcards

1
Q

in the late ? century scientist were embroiled in a debate about the fundamental nature of ?

whether it was a ?

A

17th
light

wave or a partice

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2
Q

who strongly advocate the particle nature of light

A

Sir Isaac Newton

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3
Q

who believed that the light was made up of waves vibrating up and down perpendicular to the direction of the wave propogation of the wave propagation and therefore formulated a way of visualizing wave propagation

A

Christian Huygens

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4
Q

the ? physicist Christian Huygens

A

dutch

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5
Q

states that waves can exhibit particle-like properties while particles con exhibit wave like properties.

A

WAVE-PARTICLE DUALITY THEORY

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6
Q

could behave as
particles(Photons of light)

A

Waves

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7
Q

(electron) could behave as a wave

A

Matter/Particles

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8
Q

light as wave -

A

Double Slit Experiment

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9
Q

light as particles -

A

photoelectric particles

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10
Q

After studying ? for many years, He describe how a changing electric field produces magnetic field and showed that a changing magnetic field creates an electric field

A

electromagnetic waves
JAMES MAXWEI

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11
Q

the wave predicted by maxwell would consist of oscillating electric and mognetic fields

A

(EM wave)

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12
Q

would be capable of exerting forces on charges great distances trom their source, and they might thes be detectable

A

Electiomagnetic waves

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13
Q

• it is a series of vibration or oscillaions traveling from one point to another
•It carries energy without transferring matter.

A

WAVE

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14
Q

A small drop of water on a calm water sartace can create

A

ripples

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15
Q

examples of waves

A

transverse
longitudinal

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16
Q

• light waves ripple on a water surface

A

transverse

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17
Q

sound waves

A

longitudinal

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18
Q

transverse slinky moving ?

A

up and down

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19
Q

longitudinal slinky move ?

A

back and forth

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20
Q

transverse - ?-waves

A

S-waves

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21
Q

longitudinal - ?-waves

A

P-waves

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22
Q

TRANSVERSE WAVES
- vibration of parties are ? to the direction of travel

A

perpendicular

23
Q

LONGITUDINAL WAVES
• vibration of particles are ? to the direction ot trave

A

parallel

24
Q

The height or size ot a wave

A

Amplitude

25
Q

The distance from one wave to another

A

Wave length

26
Q

the electromagnetic waves
(EM) have
common propeties

A

• They cary energy from one place to another
• They do not require a medium to propagate
• They can travel in a vacuum at a speed
of 3 × 10% m/s.

27
Q

equation 1:

A

v=Af

28
Q

= is the wavelength expressed in meters

A

A

29
Q

is the wave speed, or c (speed of light) expressed in meter per second.

A

V

30
Q

is the wave speed, or olspeed of light expressed in meter per second.

A

V

31
Q

is the frequency expressed in Hertz

A

F

32
Q

all electromagnetic waves travel at a speed of ? in a vacuum of space

A

300.000 km/s (3x10^8m/s)

33
Q

•However, when EMwaves travel through motter they ?. The speed of the wave depends upon the material they travel through

A

slow down

34
Q

vacuum - 300,000
air - slightly less than 300,000
water - 226,000
glass - 200,000
diamond - 124,000

A
35
Q

How fast a waves moves trom one place to another, measured in meters per second (m/s) or kilometers per hour (km/h)

A

WAVE VELOCITY

36
Q

It is the number of waves that pass a certain point in a specified amount of time
• It is measured in units of cycles per second or waves per second-

A

FREQUENCY

37
Q

One wave per second is also called a

A

Hertz

38
Q

Number of complete cycles or waves that occur in a given amount of time, measured in
Hertz

A

Wave Frequency

39
Q

has lots of quick Changes in the sound waves, and it feels fast and energetic

A

High - frequency music

40
Q

has slower changes in the sound waves, and it feels calm and soothing

A

Low-frequency music

41
Q
  • It is the distance measured from one crest of a wave to the next crest or from one through to the second through
A

WAVELENGTH

42
Q
  • It is the distance measured from one crest of a wave to the next crest or from one through to the second through
A

WAVELENGTH

43
Q

in an equation, wavelength is represented by the greek letter ?

A

lambda (A)

44
Q

in an equation, wavelength is represented by the greek letter ?

A

lambda (A)

45
Q

depending on the type of wave, wavelength can be measured in ?, ?, and ?

A

meters
centimeters
nanometers

46
Q

equation 2

A

E=hf

47
Q

equation 2

A

E=hf

48
Q

-EM waves carry energy called

A

radiation

49
Q

Generally, the higher the frequency of a wave, the more energy it carries and the more ? it pases

A

hazard

50
Q

The relationship between frequency and energy is summarized in ?, express as.
E = hf

A

Planck’s equation

51
Q

= energy in Joules （J） electronvolt (eV)
(1 eV =1.6 x 10^-19 J)

A

E

52
Q

h = Plank’s proportionality constant between the energy and theFrequency of EM woves

A

h= (6.63x10^-34 J.s)

53
Q

frequency in Hertz (Hz or s^-1)

A

h =

2nd Semi-Quarterly (5 decks)

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