Waves Flashcards

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1
Q

Wave transferral of energy

A

Waves transfer energy from one point to another using vibrations

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2
Q

Transverse vs longitudinal waves

A

Transverse waves move perpendicular to the direction of wave travel, examples include water and electromagnetic waves

Longitudinal waves move parallel to the direction of wave travel, examples sound and ultrasound waves

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3
Q

Frequency

A

The complete number of oscillations generated per second and is represented by f

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4
Q

Wave length

A

The distance between successive particles which are at the same point in their paths at the same time and are moving in the same direction

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5
Q

Amplitude

A

The maximum displacement of particles in the wave train from their rest positions

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6
Q

Velocity equation

A

V = F x Lambda (wavelength)

V is in m/s, frequency is in Hz, wavelength is in m

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7
Q

Applications of echoes

A
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8
Q

Ultrasound meaning & uses

A

Sound waves above 20,000 Hz

Used in medicine to measure foetal head diameter and in industry to detect defects in metals

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9
Q

Sonar vs radar

A

Sonar uses sound pulses to detect objects underwater

Radar uses electromagnetic waves to detect aircrafts and ships

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10
Q

Electromagnetic spectrum

A

Radio waves
Microwaves
Infrared
Visible light
Ultra violet
X-rays
Gamma rays

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11
Q

Results of exposure to electromagnetic spectrum

A

Microwaves cause internal heating of body tissues

Infrared radiation is felt as heat and can cause skin burns

Certain

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