Chapter 13 - Wave Flashcards
Transverse Wave are waves travel ____ to the direction of the ______
Example of Transverse wave
Perpendicular, Vibration
Light and Water Wave
Longitudinal Wave are waves that travel _______ to the direction of ______
Example of Longitudinal Wave
Parallel, Vibration
Sound Wave
The highest point of the wave is call?
Crest
The lowest point of the waves is called?
Trough
In longitudinal wave, the section in which the vibrating particle are close to each other is experiencing ______
Compression
In longitudinal wave, the section in which the vibrating particle are further away from each other is experiencing ______
Rarefaction
Define Amplitude
Maximum displacement of a point from its rest position
Define wavelength
Shortest distance between any two points in phrase
Define Frequency
The number of complete waves produced per second
S.I Unit for frequency
hertz (Hz)
Define Period, T
The time taken to produce one complete wave
S.I Unit for Period
Seconds
Conditions for two points to be in phrase (3)
Same Direction
Same Speed
Same Displacement
Frequency =
1/ Period
Velocity of WAVE =
Frequency x Wavelength
Or
Wavelength / Period
Concept of Reflection of wave = Concept of reflection of light T/F
True
After reflection, _____, _____, and _____ of the reflected wave remain UNCHANGED, Only ______ changes
Speed, Frequency, Wave Length, Only direction Changes
Refraction of waves
Properties of refracted waves (5)
When water waves travels from DEEP to SHALLOW waters
Bends towards the normal Speed Decreases Wavelength Decreases Frequency Remain unchanged Direction Changes
When drawing the refraction diagram of waves, what are the steps?
Identify the angle of incidence
Draw line of the angle of refraction
Draw horizontal Perpendicular line across the line of angle of refraction that are connected to the lines of angle of incidence
What is a waterfront
An imaginary line on a wave joins all points which have the same phrase of vibration
The two types of wave
Transverse and Longitudinal
Electromagnetic Spectrum
7 Types of waves
From long to short wavelength
Radio Wave Microwaves Infrared Visible light Ultraviolet X-Ray Gamma Ray
7 Colors of Visible light, from low frequency to high frequency
Red, Orange, Yellow, Green, Blue, Indigo, Violet
Properties of all electromagnetic spectrum (7)
Are transverse wave
Obey the laws of reflection and refraction
Can travel in vacuum
Travel in same speed, 3 x 10^8 in Vaccum
Transfer energy from one place to another
Wave speed equation, V=F x 入, is applicable to all
When Electromagnetic wave travel from one medium to another, speed and wavelength CHANGE, frequency UNCHANGED.
Use of Gamma Ray (1)
Radiation Therapy, to kill cancerous cell
Has the highest energy, as has high frequency or low wavelength, so can kill living cells
Uses of X-Ray
Radiation Therapy
X-Ray Photo
Detection of flaws in heavy metal equipment
X-Ray Machine that helps security personal screen luggage at custom checkpoint
Use of Ultraviolet
Used in sunbed and sterilization of equipment
Help increase the body’s production of Vitamin D
Use of Visible Light
Used in optical vibre
Allow us to see things
Uses of infrared radiation
Used in
remote controller,
ear thermometer,
intruder alarms
Uses of Microwaves
Use in
microwave ovens
Satellite television
GPS (Global Positioning System)
Use in communication with satellites because they can penetrate the atmosphere
Radio-Wave
Use in
Radios
Radar
Over-the-air television
Effects of ionizing radiation on living matter
Radiation Has the energy to remove electron from atom or molecule
Expose to ionizing radiation can damage biological molecule and lead to abnormal cell division
This may cause cancer and deformities to a developing fortis
